#4f5159 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	7.91:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	2.65:1	fail	fail	fail	AA: use #71747f as the text (4.51:1) AAA: use #93959f as the text (7.04:1) AA: or shift the background to #c4c4c4 (4.54:1) AAA: or shift the background to #f2f2f2 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4f5159 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

2563eb 52525b 16a34a fafafa 18181b

Console Light

Open in tool →

A sober docs palette: one blue for interactive, one green for success, zinc greys for everything else.

Technical Clean Light

Fonts for this mood

#4f5159 reads as neutral, minimal. The font library is tagged with the same vocabulary:

Neutral fonts →Minimal fonts →

mcpConnect your agent — build around #4f5159

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 #4f5159 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4f5159-a2beb0-c859d4-1f2d2b-eaf1e9?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