#218256 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	4.78:1	pass	pass	fail	AAA: use #186241 as the text (7.34:1)
Aaon black	4.39:1	fail	pass	fail	AA: use #228759 as the text (4.68:1) AAA: use #2bab72 as the text (7.17:1) AA: or shift the background to #fafafa (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #218256 as the background.

Brands using this color

mcpConnect your agent — build around #218256

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 #218256 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/218256-a2beb5-d459cc-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