#21312a as text	Ratio	AA	AA large	AAA	Fix
Aaon white	13.66:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.54:1	fail	fail	fail	AA: use #547d6b as the text (4.52:1) AAA: use #6f9f8a as the text (7:1) AA: or shift the background to #949494 (4.5:1) AAA: or shift the background to #bababa (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21312a as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#21312a reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

Luxury fonts →Bold fonts →

mcpConnect your agent — build around #21312a

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 #21312a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21312a-a2beb5-d459ca-1f2d2d-e9f1ea?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