#100b51 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	17.67:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.19:1	fail	fail	fail	AA: use #6b62ea as the text (4.56:1) AAA: use #918aef as the text (7.09:1) AA: or shift the background to #828282 (4.6:1) AAA: or shift the background to #a3a3a3 (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #100b51 as the background.

Brands using this color

Railwayprimary · #13044c · Δ1.727

Fonts for this mood

#100b51 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →Luxury fonts →Bold fonts →

mcpConnect your agent — build around #100b51

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 #100b51 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/100b51-a39cc4-dfa24e-261f2d-e9edf1?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