#637a57 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	4.72:1	pass	pass	fail	AAA: use #4b5c42 as the text (7.22:1)
Aaon black	4.45:1	fail	pass	fail	AA: use #667d59 as the text (4.64:1) AAA: use #849e76 as the text (7.13:1) AA: or shift the background to #fafafa (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #637a57 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

8fae6a 6b7a5a d9a05b 1b2419 e9e6dc

Forest Floor

Open in tool →

Moss and bark with a mushroom-cap amber — grounded and quiet, made for long-form nature content.

Dark Muted WarmOutdoors

mcpConnect your agent — build around #637a57

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 #637a57 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/637a57-a8bea2-664edf-1f2d21-f0f1e9?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