#516185 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	6.18:1	pass	pass	fail	AAA: use #4a5878 as the text (7.1:1)
Aaon black	3.4:1	fail	pass	fail	AA: use #6476a0 as the text (4.64:1) AAA: use #8a98b7 as the text (7.26:1) AA: or shift the background to #dedede (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #516185 as the background.

Brands using this color

Stripesecondary · #50617a · Δ1.832

Palettes built around it

4b5d8a 8b97b3 c07a4e eef0f4 1f2430

Dusk

Open in tool →

Slate blue with a copper accent — calm, professional, slightly editorial; suits consultancies and journals.

Cool Muted Elegant

mcpConnect your agent — build around #516185

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 #516185 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/516185-9ca3c4-df6e4e-211f2d-e9eff1?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