#21a172 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	3.28:1	fail	pass	fail	AA: use #1b835d as the text (4.72:1) AAA: use #146145 as the text (7.43:1) AA: or shift the background to #262626 (4.62:1)
Aaon black	6.41:1	pass	pass	fail	AAA: use #23a978 as the text (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21a172 as the background.

Brands using this color

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

Palettes built around it

0b3d91 4b6a9b 00a878 ffffff 0b1f3a

Fintech Trust

Open in tool →

Navy signals custody and stability; the green accent is money moving the right way. No red anywhere except errors.

Cool Clean ModernFintech

mcpConnect your agent — build around #21a172

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 #21a172 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21a172-a2beb7-d459c2-1f2c2d-e9f1eb?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