#665eb5 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	5.48:1	pass	pass	fail	AAA: use #544ca4 as the text (7.13:1)
Aaon black	3.83:1	fail	pass	fail	AA: use #746cbc as the text (4.61:1) AAA: use #958fcc as the text (7.08:1) AA: or shift the background to #ebebeb (4.6:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #665eb5 as the background.

Brands using this color

Sentrysecondary · #6a5fc1 · Δ1.98

Fonts for this mood

#665eb5 reads as cool, modern. The font library is tagged with the same vocabulary:

Modern fonts →

mcpConnect your agent — build around #665eb5

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 #665eb5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/665eb5-a59cc4-dfa74e-271f2d-e9ecf1?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