#3f978e as text	Ratio	AA	AA large	AAA	Fix
Aaon white	3.48:1	fail	pass	fail	AA: use #36817a as the text (4.59:1) AAA: use #29615b as the text (7.11:1) AA: or shift the background to #212121 (4.62:1)
Aaon black	6.03:1	pass	pass	fail	AAA: use #45a59c as the text (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f978e 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

2a9d8f 8ecae6 e9c46a f7fafc 1a2b3c

Coastal

Open in tool →

Sea-teal, sky and sand — bright without shouting; works for travel, wellness, and anything near water.

Cool Light Clean

mcpConnect your agent — build around #3f978e

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 #3f978e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3f978e-a2bebe-d459a1-1f292d-e9f1ed?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