#c43331 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	5.43:1	pass	pass	fail	AAA: use #a32b29 as the text (7.16:1)
Aaon black	3.87:1	fail	pass	fail	AA: use #cf423f as the text (4.5:1) AAA: use #dd7a78 as the text (7.13:1) AA: or shift the background to #ebebeb (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 #c43331 as the background.

Brands using this color

Wiseaccent · #cb272f · Δ1.69

Palettes built around it

d4af37 8a8a8a c0392b 0d0d0d f5f5f5

Noir Beauty

Open in tool →

Black, gold and one deep red — the prestige cosmetics counter: all restraint and a single lipstick.

Dark Luxury BoldBeauty

Fonts for this mood

#c43331 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 #c43331

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 #c43331 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/c43331-c4a19c-62cb9a-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