#15313c as text	Ratio	AA	AA large	AAA	Fix
Aaon white	13.67:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.54:1	fail	fail	fail	AA: use #367e9b as the text (4.61:1) AAA: use #4ea0c1 as the text (7.12:1) AA: or shift the background to #949494 (4.51:1) AAA: or shift the background to #bababa (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #15313c as the background.

Brands using this color

Vimeosecondary · #23313b · Δ1.734

Fonts for this mood

#15313c reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

Luxury fonts →Bold fonts →Modern fonts →

mcpConnect your agent — build around #15313c

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 #15313c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15313c-9cb4c4-df4e6b-1f232d-e9f1ef?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