#309c8a as text	Ratio	AA	AA large	AAA	Fix
Aaon white	3.36:1	fail	pass	fail	AA: use #288172 as the text (4.69:1) AAA: use #1e6256 as the text (7.15:1) AA: or shift the background to #262626 (4.5:1)
Aaon black	6.25:1	pass	pass	fail	AAA: use #34a894 as the text (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #309c8a 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 #309c8a

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 #309c8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/309c8a-a2bebd-d459a9-1f292d-e9f1ec?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