#1b0d21 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	18.65:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.13:1	fail	fail	fail	AA: use #9e57bc as the text (4.54:1) AAA: use #b783ce as the text (7.15:1) AA: or shift the background to #7d7d7d (4.53:1) AAA: or shift the background to #a1a1a1 (7.22:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b0d21 as the background.

Brands using this color

Sentrytext · #150f23 · Δ1.443

Palettes built around it

ff6f61 ffb347 c9518b 1a0f1f fff3e0

Sunset Boulevard

Open in tool →

Coral, apricot and magenta on aubergine — the gradient sunset every event brand wants, decomposed into flat tokens.

Warm Vivid Bold Dark

Fonts for this mood

#1b0d21 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 #1b0d21

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 #1b0d21 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b0d21-ba9fc1-b4cb62-2d1f2b-ebe9f1?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