#3c66b9 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	5.54:1	pass	pass	fail	AAA: use #33579e as the text (7.01:1)
Aaon black	3.79:1	fail	pass	fail	AA: use #4a73c4 as the text (4.54:1) AAA: use #7897d3 as the text (7.17:1) AA: or shift the background to #e8e8e8 (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 #3c66b9 as the background.

Brands using this color

Netflixaccent · #3860be · Δ1.978

Fonts for this mood

#3c66b9 reads as cool, modern. The font library is tagged with the same vocabulary:

Modern fonts →

mcpConnect your agent — build around #3c66b9

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 #3c66b9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3c66b9-9ca5c4-df694e-211f2d-e9f0f1?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