#183521 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	13.38:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.57:1	fail	fail	fail	AA: use #3c8653 as the text (4.73:1) AAA: use #4ca969 as the text (7.19:1) AA: or shift the background to #969696 (4.52:1) AAA: or shift the background to #bdbdbd (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #183521 as the background.

Brands using this color

Retoolsecondary · #0e352c · Δ1.948

Fonts for this mood

#183521 reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

Luxury fonts →Bold fonts →

mcpConnect your agent — build around #183521

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 #183521 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/183521-a2beae-c059d4-1f2d2a-ebf1e9?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