Colorflow — the in-game colour picker for Minecraft

Thank you very much for Elfi for the project icon!

Stop guessing. Pick a colour, get the nine closest real Minecraft blocks, and build a smooth, pixel-perfect gradient — all without leaving the game.

Colorflow is a lightweight, fully client-side mod that turns Minecraft into a professional-grade colour-matching and gradient tool. It uses the scientific CIEDE2000 (ΔE 2000) colour-difference formula — the same standard used by painters, designers and print workflows — to rank every block in your game (vanilla and modded) against any colour you want.

Why builders love it

• 9 closest blocks for any colour, ranked by true ΔE 2000 perceptual distance (not a naive RGB guess).
• One-click gradients — pick a start and end block, and Colorflow generates a smooth 3 to 9 step gradient using real block icons and an ideal interpolated colour ramp.
• ΔE quality score — an “Average deviation ΔE” badge tells you exactly how close the gradient is, with a colour-coded rating (green ≤ 2, amber ≤ 10, red beyond).
• Fill your hotbar in one click — push the generated block stack straight into your hotbar (creative mode).
• Exact block IDs — copy the full list, or grab any block’s ID, hex, or name instantly.
• Eyedropper — sample the exact colour of the block you’re looking at and match it immediately.

Real numbers, real results

Match tab — the colour engine

A Photoshop-style HSB picker: a saturation/value square, a full hue spectrum, RGB channel sliders and a live hex field. As you move, the nine closest blocks update in real time with their block icon, ID, shape and a ΔE 2000 score.

• Left-click a match → get the block.
• Shift+click → copy the block ID.
• Right-click → set it as the gradient start.
• Filters: Full blocks only, Vanilla only, Hide tinted (grass/leaves/biome-coloured) — so you always get buildable results.
• Clipboard: copy / paste hex (#RRGGBB) from anywhere.

Gradient tab — smooth block ramps

• Block browser with live text search (try “terracotta”, “concrete”, “wool”…).
• Set Start and End blocks, choose 3 to 9 steps, and see a live preview with real block icons plus the ideal colour ramp underneath.
• The Average deviation ΔE value measures how faithful the gradient is to the true colour interpolation.
• Fill hotbar, Copy list (block IDs), and Swap ends — all one click.

Quick start

1. Install the jar for your Minecraft version (one jar per version — no guessing).
2. Press the Colorflow key (default: C — change it in Controls > Key Binds).
3. Pick a colour, click a block, and build.

Requires Fabric Loader and Fabric API. No server-side mod needed — works in singleplayer and on any server where you have client mods allowed.

Supported versions

Every supported Minecraft version gets its own jar, exactly named for it:

1.19 · 1.19.1 · 1.19.2 · 1.19.3 · 1.19.4 · 1.20 · 1.20.1 · 1.20.2 · 1.20.3 · 1.20.4 · 1.20.5 · 1.20.6 · 1.21 · 1.21.1 · 1.21.2 · 1.21.3 · 1.21.4 · 1.21.5 · 1.21.6 · 1.21.7 · 1.21.8 · 1.21.9 · 1.21.10 · 1.21.11 · 26.1 · 26.1.1 · 26.1.2 · 26.2

Translations

Colourful for everyone: fully localised in English, Français, Deutsch, Español, Italiano, Português (BR), Русский, 日本語, 한국어, 简体中文.

Changelog — 2.0.0

• Rebuilt around CIEDE2000 for precise colour matching.
• Redesigned, performance-optimised UI (Match tab stays at a smooth frame rate even while dragging).
• New Gradient tab with configurable 3–9 step ramps and a ΔE quality badge.
• One-click hotbar fill, block-ID copy, hex clipboard, eyedropper.
• 10 languages.
• Published for 28 Minecraft versions.