#133f63 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	10.94:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.92:1	fail	fail	fail	AA: use #257bc1 as the text (4.68:1) AAA: use #4b9bdd as the text (7.03:1) AA: or shift the background to #a8a8a8 (4.6:1) AAA: or shift the background to #cfcfcf (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #133f63 as the background.

Brands using this color

Plaidaccent · #043c67 · Δ1.604

Fonts for this mood

#133f63 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 #133f63

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 #133f63 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/133f63-9cadc4-df4e53-1f212d-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