KOLOR is A free color palette hub for the Unreal Editor

build, name, match and share palettes without leaving your project.

Videos DOC About the plugin:

| First Look of KOLOR | How to Use KOLOR |

Place to Find some cool Color libraries

GIMPPalettes on github | ColorWall.ase by csicolors

KOLOR turns the Unreal Editor into a real color workspace. Build named swatch libraries across as many pages as you need, import colors from the tools you already use, extract palettes straight out of your viewport or a reference image, and generate a full contrast-checked UI color scheme from a single base color which is complete with WCAG grading and a colorblind-safe preview.

Everything lives in its own standalone store. KOLOR never touches the engine's built-in Color Themes, so it's safe to install alongside your existing workflow. Your palette library is editor-global by default, following you across every project, with an optional per-project override folder for the people that wants to commit and ship their own brand palette.

So a solo dev keeping a UI kit consistent or a team standardizing on one set of brand colors, i will literally recommend KOLOR cause it's built to be single place your palette actually lives.

Features:

Palette Library

• Reflowing swatch grid with inline rename, show/hide names, and Ctrl+Scroll zoom

• Unlimited palette pages : switch, rename, duplicate, delete, with your last-open page remembered between sessions

• Editor-global storage by default, with an optional per-project override folder for shipping a project-specific brand palette (committable to source control)

• Star colors and whole pages into a dedicated Favorites view

• Search the library by name, hex, RGB, or HSV

• Copy any swatch as Hex, RGB, HSV, or Unreal's native color-property text

Import & Export

• Import: KOLOR JSON, plain hex .txt lists, GIMP .gpl, Adobe .ase, Paint.NET .txt

• Export: every import format, plus CSS custom properties (:root { --name: #hex; })

• Multi-file import, optional dedupe, and a confirmation guard on unusually large imports

• Export a single page or your entire library at once

Extraction

• Sample a palette directly from the active viewport

• Extract a palette from any image file

• Deterministic median-cut color quantization with adjustable color count, saturation, and luminance filters

Naming & Identification

• A built-in named-color database (CSS keywords plus a large set of descriptive names) with nearest-match lookup

• One-click auto-name for any swatch

Matcher to Generate a UI Color Scheme

• Pick one base color and get a full role set back: background, surface, border, primary/secondary text, button (+ hover), accent

• Five harmony modes : complementary, analogous, triadic, split-complementary, tetradic

• Per-role locking, so any generated role can become your literal base color

• Live WCAG contrast grading (AAA / AA / AA Large / Fail) on every text pairing

• Colorblind preview : protanopia, deuteranopia, and tritanopia simulation across the whole tab

• Dual live preview: a content card and a settings-panel layout, so every role gets exercised

• Save a generated scheme straight into your library as its own page, or add roles individually

💛 Thank you for checking out KOLOR! If you have comments, suggestions, or ideas to help improve the plugin, I'd love to hear them and if it's working well for you, a review (a big, huge one, haha) genuinely makes a difference!