#213435 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	13.07:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.61:1	fail	fail	fail	AA: use #517e81 as the text (4.65:1) AAA: use #6ca0a3 as the text (7.19:1) AA: or shift the background to #999999 (4.59:1) AAA: or shift the background to #bfbfbf (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #213435 as the background.

Brands using this color

Vimeosecondary · #23313b · Δ1.776

Fonts for this mood

#213435 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

Luxury fonts →Bold fonts →

mcpConnect your agent — build around #213435

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 #213435 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/213435-a2b9be-d4598e-1f262d-e9f1ee?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