#4b100b as text	Ratio	AA	AA large	AAA	Fix
Aaon white	15.24:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.38:1	fail	fail	fail	AA: use #de3121 as the text (4.57:1) AAA: use #e87368 as the text (7.08:1) AA: or shift the background to #8c8c8c (4.53:1) AAA: or shift the background to #b0b0b0 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4b100b as the background.

Brands using this color

Boxaccent · #48060a · Δ1.959

Fonts for this mood

#4b100b reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

Warm fonts →Playful fonts →Bold fonts →Luxury fonts →

mcpConnect your agent — build around #4b100b

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 #4b100b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4b100b-c4a49c-62cba1-2d261f-f1e9ec?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