#b3170f as text	Ratio	AA	AA large	AAA	Fix
Aaon white	6.89:1	pass	pass	fail	AAA: use #af160e as the text (7.13:1)
Aaon black	3.05:1	fail	pass	fail	AA: use #e71d13 as the text (4.58:1) AAA: use #f26a63 as the text (7.02:1) AA: or shift the background to #d1d1d1 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #b3170f as the background.

Brands using this color

Twilioaccent · #b10f23 · Δ1.866

Palettes built around it

b91c1c 78716c d97706 f5f1ea 1c1917

Newsprint

Open in tool →

Ink-black on warm paper with a single red — the broadsheet hierarchy that lets typography lead.

Editorial Muted Warm

Fonts for this mood

#b3170f 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 #b3170f

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 #b3170f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b3170f-c4a39c-62cb9d-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