#66d1ff as text	Ratio	AA	AA large	AAA	Fix
Aaon white	1.73:1	fail	fail	fail	AA: use #007db3 as the text (4.58:1) AAA: use #005d85 as the text (7.23:1) AA: or shift the background to #525252 (4.51:1) AAA: or shift the background to #333333 (7.3:1)
Aaon black	12.13:1	pass	pass	pass	Passes AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #66d1ff as the background.

Brands using this color

PayPalsecondary · #65ccfc · Δ1.345

Fonts for this mood

#66d1ff reads as cool, vivid, light. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →Clean fonts →

mcpConnect your agent — build around #66d1ff

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 #66d1ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66d1ff-9cb3c4-df4e69-1f232d-e9f1f0?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