#421a2b as text	Ratio	AA	AA large	AAA	Fix
Aaon white	14.85:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.41:1	fail	fail	fail	AA: use #b9507c as the text (4.5:1) AAA: use #cc7f9f as the text (7.1:1) AA: or shift the background to #8f8f8f (4.59:1) AAA: or shift the background to #b3b3b3 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #421a2b as the background.

Brands using this color

Fonts for this mood

#421a2b reads as warm, dark, luxury. The font library is tagged with the same vocabulary:

Warm fonts →Luxury fonts →Bold fonts →

mcpConnect your agent — build around #421a2b

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 #421a2b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/421a2b-c49ca8-62cb6d-2d201f-f1e9f0?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