#21d2ed as text	Ratio	AA	AA large	AAA	Fix
Aaon white	1.83:1	fail	fail	fail	AA: use #0c8092 as the text (4.65:1) AAA: use #095f6d as the text (7.32:1) AA: or shift the background to #4d4d4d (4.63:1) AAA: or shift the background to #303030 (7.23:1)
Aaon black	11.51:1	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 #21d2ed as the background.

Brands using this color

Vimeoprimary · #14d3fb · Δ1.973

Fonts for this mood

#21d2ed reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →

mcpConnect your agent — build around #21d2ed

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 #21d2ed and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21d2ed-a2b7be-df4e81-1f252d-e9f1ee?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