#537da2 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	4.35:1	fail	pass	fail	AA: use #517a9e as the text (4.54:1) AAA: use #3d5b76 as the text (7.1:1) AA: or shift the background to #0a0a0a (4.55:1)
Aaon black	4.82:1	pass	pass	fail	AAA: use #7599b8 as the text (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #537da2 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

mcpConnect your agent — build around #537da2

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 #537da2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/537da2-9cadc4-df4e51-1f212d-e9f1f1?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