#ca2129 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	5.58:1	pass	pass	fail	AAA: use #ab1c23 as the text (7.19:1)
Aaon black	3.76:1	fail	pass	fail	AA: use #dd3139 as the text (4.57:1) AAA: use #e87379 as the text (7.16:1) AA: or shift the background to #e8e8e8 (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ca2129 as the background.

Brands using this color

Fonts for this mood

#ca2129 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 #ca2129

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 #ca2129 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ca2129-c49f9c-62cb93-2d251f-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