Burning Ultrablue as text	Ratio	AA	AA large	AAA	Fix
Aaon white	9.18:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	2.29:1	fail	fail	fail	AA: use #6a62f8 as the text (4.72:1) AAA: use #8f89fa as the text (7.13:1) AA: or shift the background to #b8b8b8 (4.63:1) AAA: or shift the background to #e3e3e3 (7.16:1)

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

Brands using this color

Fonts for this mood

Burning Ultrablue reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →

mcpConnect your agent — build around Burning Ultrablue

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 #150aec and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/150aec-a39cc4-dfa04e-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