#ef4943 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	3.68:1	fail	pass	fail	AA: use #e61b14 as the text (4.63:1) AAA: use #ae140f as the text (7.22:1) AA: or shift the background to #1c1c1c (4.63:1)
Aaon black	5.7:1	pass	pass	fail	AAA: use #f26d69 as the text (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ef4943 as the background.

Brands using this color

Clerksecondary · #ef4444 · Δ0.801

Fonts for this mood

#ef4943 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

Warm fonts →Playful fonts →Bold fonts →

mcpConnect your agent — build around #ef4943

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 #ef4943 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ef4943-c4a29c-62cb9c-2d261f-f1e9ed?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