#181221 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	18.3:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.15:1	fail	fail	fail	AA: use #8368ac as the text (4.54:1) AAA: use #a18cc0 as the text (7.03:1) AA: or shift the background to #808080 (4.63:1) AAA: or shift the background to #a1a1a1 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #181221 as the background.

Brands using this color

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

#181221 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

Luxury fonts →Bold fonts →

mcpConnect your agent — build around #181221

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 #181221 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/181221-b19cc4-dfd34e-2b1f2d-e9eaf1?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