Undertale coloring pages: 76+ free printable PDF designs covering the full cast of Undertale, from main characters like Sans, Frisk, Toriel, and Undyne to the complete monster roster across Snowdin, Waterfall, and Hotland. Every page is free to download as a PDF or color in the browser, with no account required.
Undertale is an RPG developed and released by Toby Fox in 2015. The game follows Frisk, a child who falls into the Underground, a world beneath the surface where monsters live after losing a war with humans. What separates it from most RPGs is its core mechanic: you can complete the entire game without killing a single enemy.
These pages suit Undertale fans of all ages, from players who know the full cast to younger children introduced to the game through older siblings or parents.
The coloring range here is unusually wide: from a pale grey ghost with two dot eyes to a theatrical robot in white armor. Over 60 named characters, no two pages requiring the same approach.
Quick Answer
Undertale coloring pages are a free set of 76+ printable PDFs and browser-based sheets covering the full game cast, from main story characters to rare and minor monsters.
Best for: Undertale fans aged 8 and up, players who know the game’s characters, and younger children introduced to the game by family members
Formats: printable PDF and online coloring
Popular pages: Sans, Frisk, Toriel, Undyne, Mettaton EX, Flowey, and Asriel
Creative uses: a full main cast lineup, a Snowdin monster set, a Sans variant gallery, and an amalgamate study
What’s Inside Undertale Coloring Pages
The set covers over 60 named characters. This section focuses on the main cast and fan favorites, then groups the minor monsters by palette and region.
Main Cast
Eight pages cover Frisk, Sans, Toriel, Flowey, Asriel, and their scene combinations.
Coloring Frisk: dark brown hair, medium-dark skin, and a blue-and-purple horizontal striped shirt. The stripes are the most recognizable element: equal-width bands of blue and purple alternating across the shirt.
Coloring Sans: white skull, pale periwinkle zip-up jacket (muted, not vivid blue), white t-shirt, black shorts, and pink fuzzy slippers. The slippers matter: they are the deliberate casual detail that defines the character.
Coloring Toriel: white-cream fur, short curved horns, and a flowing blue-purple robe with white trim. The robe sits between navy and lavender, not quite either. Her snout and inner ears are slightly darker than her main fur.
Coloring Flowey: bright warm yellow petals, pale beige center, dark green stem. Keep the petals golden yellow rather than cool lemon. His standard expression is friendly; the sinister form is Photoshop Flowey, a separate page.
Coloring Asriel: white-cream fur matching Toriel’s, but with a softer, more childlike expression, and dark green tunic clothing. The green sits saturated enough to read clearly against the white fur.
Undyne, Mettaton, and Boss Forms
Seven pages cover the game’s most visually complex characters: Undyne, Mettaton Overworld EX, Mettaton EX, Mettaton NEO, God of Hyperdeath, Gaster Blaster, and Photoshop Flowey.
Coloring Undyne: rich teal-blue fish scales, red fins (not hair), grey-silver armor, and one visible yellow eye. The red fins against the teal-blue are the sharpest color contrast in the main cast.
Coloring Mettaton EX: pale white-cream body, warm rose-pink accents at joints and screen, dark rectangular screen face. The contrast between the white body and the dark face panel is the central relationship. NEO form uses the same pale body but with red accents and a heavier silhouette.
Coloring boss forms: God of Hyperdeath is Asriel’s final form: white fur base surrounded by rainbow magical elements and dark outlines, the most color-complex page in the set. Photoshop Flowey is a disturbing fusion of faces and VHS elements around a central yellow flower; the yellow petals against the dark surrounding mass are the key contrast to preserve. Gaster Blaster is a white-grey skull, black hollow eye sockets, and a blue-white beam interior.
Fan-Favorite Supporting Characters
Five pages cover characters fans return to most outside the main story: Napstablook, Grillby, Burgerpants, Temmie, and Nice Cream Guy.
Coloring Napstablook: pale white-grey teardrop ghost, almost no detail beyond the form and the two dark eyes. The ghost itself should be barely off-white, with the dark eyes as the only strong contrast on the page.
Coloring Grillby: orange-yellow flame head, ranging from bright yellow-white at the center to deeper orange at the edges, paired with a dark formal suit and round glasses. The warm flame against the dark suit is what makes the design.
Coloring Burgerpants: tan-grey cat fur, half-closed tired eyes, dark brown fast food uniform. The uniform is the darkest element; fur and cap sit at a mid-warm tan.
Coloring Temmie: white body, blue-and-white striped shirt, simple dot eyes. Clean and minimal, with the blue stripes as the only color beyond white.
Monster Groups
Rather than listing all 40+ minor monsters individually, here is how they group by palette and region.
Snowdin monsters (Snowdrake, Ice Cap, Chilldrake, Ice Wolf): all use pale blue-white palettes with cool grey undertones. No warm colors appear in this group. Ice Cap’s baseball cap is the only distinguishing detail.
Waterfall and Hotland monsters: Woshua is white with pale blue bubble details. Shyren is soft, pale pink-lavender. Aaron is a solid medium ocean blue. Vulkin has dark grey-black rock with vivid orange-red lava in the cracks. Pyrope is deep red-orange throughout. Madjick has a deep purple hat and robe with pale glowing orbs. Knight Knight wears near-black armor with a sleepy expression. Tsunderplane is dark grey-blue with pink blush marks.
Muffet: entirely purple, from her skin to her dress to her web accessories. The range goes from a medium warm purple on her skin to a deeper purple-violet on the dress. Pink cheeks and pale hair are the only breaks from the purple palette.
Small and miscellaneous monsters: Froggit and Final Froggit are green frogs with dark spots. Vegetoid has a green leafy top and an orange-yellow root vegetable face. Parsnik is pale cream-white with small green leaf tips. The mold monsters (Moldsmal, Moldessa, Moldbygg) are muted grey-green blobs. Lemon Bread is a pale, sickly yellow amalgamate; Endogeny is a grey-white merged dog mass. Gyftrot is a brown reindeer covered in bright ornaments. Nacarat Jester is warm red-orange with jester bells. Jerry is flat, muted cream-grey: the design is deliberately unremarkable.
Sans Variants and Fan Pages
Six pages cover fan-popular Sans variants: Lovely Sans, Lazy Sans, Kawaii Sans, Ink Sans, and two scene pages.
The standard Sans palette (periwinkle jacket, white skull, black shorts, pink slippers) carries across all variants. Lovely Sans adds pink hearts and warmer tones. Lazy Sans keeps the standard palette with a looser pose. Kawaii Sans shifts everything to softer pastels. Ink Sans is the exception: multicolor ink splatters in blue, yellow, and red across the jacket, plus a paintbrush: the most color-complex page in the Sans group.
Printable PDF and Online Undertale Coloring Pages
The complex pages (Mettaton EX, God of Hyperdeath, Photoshop Flowey, Ink Sans, Endogeny) reward printing for close detail work. Simple pages like Napstablook, Woshua, and the mold monsters work fine on screen.
What These Pages Do
One person made Undertale. Toby Fox wrote the code, designed every character, wrote every line of dialogue, and composed the entire 101-track soundtrack himself. He started at 21 years old and released the game two and a half years later, on September 15, 2015. It became one of the most discussed indie games ever made.
This is worth knowing when you open a coloring page. Every character in Undertale was originally a pixel sprite, most of them just a few dozen pixels tall. Each one had to be immediately recognizable at that scale: Flowey is a yellow flower, Sans is a white skull in a blue jacket, Napstablook is a grey teardrop. The designs are stripped to the minimum because one person was building them to work small. These coloring pages are the first time those stripped-down designs get to exist at full illustration scale.
The game also makes an unusual ask: you do not have to kill anyone. Every monster has a name, a personality, and a way to resolve the encounter without fighting. Jerry shows up.
The AAP notes that coloring activities featuring characters from games with named, individual monsters with distinct personalities support children’s perspective-taking, particularly when those characters are encountered in a context that rewards thinking about their motivations rather than treating them as obstacles.
Art therapy practitioners note that coloring pages based on game characters are reported as especially engaging by children and teenagers who feel distant from traditional coloring subjects, as the familiar characters create a bridge to the activity through something they already care about.
How to Color Undertale Coloring Pages
Start with the character’s most distinctive single element. Sans has pink slippers. Undyne has red fins. Grillby has a fire head. These are the things fans identify first. Getting the most recognizable element right anchors the whole page; then, build the rest of the palette around it.
The monster palette is mostly cool and muted. Most Undertale characters use slightly desaturated, cool-leaning colors: pale blues, grey-greens, cream-whites. The warm monsters (Vulkin’s lava, Pyrope’s red, Grillby’s flame, Nacarat Jester’s orange) stand out because everything around them is cool and muted. Keep the cool monsters in their muted range, and the warm ones will read with more impact.
For the amalgamate pages, vary light and dark instead of adding colors. Lemon Bread is almost entirely pale yellow. Endogeny is almost entirely grey-white. These pages work through shading: lighter on the raised areas, darker where the merged forms meet. Introducing new colors breaks the unsettling quality of the design.
5 Creative Craft Ideas with Undertale Coloring Pages
Main Story Lineup
Color Frisk, Sans, Toriel, Undyne, Flowey, and Asriel in their accurate palettes and arrange them in story order from the beginning of the game to the end.
Six characters, the full emotional arc of the pacifist route. Takes about thirty minutes.
Monster Region Set
Color one monster from Snowdin (pale blue-white palette), one from Waterfall (cool mixed), and one from Hotland (warm or fire palette). Keep the regional temperature consistent across all three pages.
Three pages, three color temperatures in sequence. Takes about twenty minutes.
Mettaton Form Study
Color Mettaton Overworld EX, Mettaton EX, and Mettaton NEO side by side, using the same pale base body tone across all three. Change only the accent color (pink for EX, red for NEO) to show how the same character shifts from glamorous to militarized.
One character, three forms, one base palette. Takes about twenty minutes.
Amalgamate Study
Color Endogeny and Lemon Bread as a pair using only variations in light and dark, no new colors. Lighter on the raised surfaces, darker where the merged forms meet.
Two of the most technically challenging pages in the set. Takes about twenty-five minutes.
Sans Variant Gallery
Color all six Sans pages, keeping the skull white and the slippers pink on every version. Change only the jacket and accent details to show how each variant builds on the same base character.
Six variants, one consistent anchor. Takes about thirty-five minutes.
FAQ About Undertale Coloring Pages
Are these Undertale coloring pages free, and can I color them online?
Yes. Every page is free, with no account, email, or payment required. Download the PDF to print at home, or open it in the online coloring tool to color on screen.
What is Undertale?
Undertale is an RPG developed and released by Toby Fox on September 15, 2015. The game follows Frisk, a child who falls into the Underground, a world beneath the surface where monsters live. Undertale is unusual among RPGs because the player can complete the entire game without killing a single enemy, a route known as the pacifist ending.
Who made Undertale?
Undertale was made entirely by one person, Toby Fox. He wrote the code, designed every character, wrote the dialogue, and composed the entire 101-track soundtrack alone. He started development at 21 years old and released the game two and a half years later. The project was funded through a Kickstarter campaign in 2014 that reached its goal in 27 days.
Who are the main characters in Undertale?
The main characters are Frisk, the human child protagonist; Sans, a skeleton and one of the game’s most iconic characters; Toriel, a goat-monster who guides Frisk at the start; Flowey, the main antagonist; Asriel, a goat child connected to the game’s backstory; Undyne, the captain of the royal guard; and Mettaton, a robot entertainer who serves as a major boss.
What is the pacifist route in Undertale?
The pacifist route is a playthrough where the player completes the game without killing any enemies. Instead of fighting, the player uses the ACT command to interact with each monster and resolve the encounter peacefully. It is one of three main endings and is widely considered the game’s true ending.
What is an amalgamate in Undertale?
Amalgamates are monsters that resulted from an experiment gone wrong in the game’s backstory. There are multiple monsters fused into a single form. The amalgamate pages in this set include Lemon Bread, Endogeny, and Memoryhead. Their designs are deliberately unsettling, with multiple merged faces, limbs, and bodies visible in a single form.
Are these official Undertale coloring pages?
No. These are fan-made coloring sheets for personal use and are not affiliated with, licensed by, or endorsed by Toby Fox or any other rights holder of Undertale.
What age group are these pages best suited for?
Undertale coloring pages are best for children aged 8 and up. The amalgamate designs and Photoshop Flowey are unsettling and better suited to older children who know the game. Simpler pages like Froggit, Napstablook, and the rabbit monsters are accessible to younger children.
Start Coloring
Download any page by clicking the design. No account, email, or payment is required. Pages print directly from the browser at full resolution or open in the online coloring tool for screen use. Share finished pages on Facebook or Pinterest using the share buttons at the top of each design page.
