#391fff as text	Ratio	AA	AA large	AAA	Fix
Aaon white	7.46:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	2.81:1	fail	fail	fail	AA: use #6f5cff as the text (4.65:1) AAA: use #9385ff as the text (7.04:1) AA: or shift the background to #c9c9c9 (4.51:1) AAA: or shift the background to #fafafa (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #391fff as the background.

Brands using this color

Warpsecondary · #2a1eff · Δ1.814

Fonts for this mood

#391fff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →

mcpConnect your agent — build around #391fff

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 #391fff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/391fff-a59cc4-dfaa4e-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