#21ca64 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	2.17:1	fail	fail	fail	AA: use #168844 as the text (4.53:1) AAA: use #106532 as the text (7.17:1) AA: or shift the background to #424242 (4.64:1) AAA: or shift the background to #242424 (7.17:1)
Aaon black	9.7:1	pass	pass	pass	Passes AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21ca64 as the background.

Brands using this color

Obsidianaccent · #22c55e · Δ1.418

Palettes built around it

ff8c00 3b82f6 22c55e fff8e7 1d1d1d

Playground

Open in tool →

Orange, blue and green — the colors of playground equipment; loud, cheerful, obviously for kids.

Bold Playful WarmKids

mcpConnect your agent — build around #21ca64

live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp

claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp

try this prompt

›analyze #21ca64 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21ca64-a2beb0-ca59d4-1f2d2b-eaf1e9?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md