#397fa7 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	4.4:1	fail	pass	fail	AA: use #387ca3 as the text (4.59:1) AAA: use #2a5c7a as the text (7.22:1) AA: or shift the background to #080808 (4.55:1)
Aaon black	4.77:1	pass	pass	fail	AAA: use #589dc6 as the text (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #397fa7 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

e63946 457b9d f4a261 fff4e0 23201c

Retro Pop

Open in tool →

Fifties-diner red and steel blue with a peach — nostalgic pop that still passes contrast.

Playful Bold Warm

Fonts for this mood

#397fa7 reads as cool, modern. The font library is tagged with the same vocabulary:

Modern fonts →

mcpConnect your agent — build around #397fa7

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 #397fa7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/397fa7-9cb1c4-df4e5f-1f222d-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