Slack Secondary as text	Ratio	AA	AA large	AAA	Fix
Aaon white	9.68:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	2.17:1	fail	fail	fail	AA: use #bd05f5 as the text (4.5:1) AAA: use #d864fc as the text (7.15:1) AA: or shift the background to #b3b3b3 (4.62:1) AAA: or shift the background to #dedede (7.19:1)

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

Brands using this color

Slacksecondary · #730394

Fonts for this mood

Slack Secondary 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 Slack Secondary

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 #730394 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/730394-bd9fc1-adcb62-2d1f2a-ece9f1?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