#40403b as text	Ratio	AA	AA large	AAA	Fix
Aaon white	10.42:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	2.01:1	fail	fail	fail	AA: use #75756c as the text (4.52:1) AAA: use #96968d as the text (7.04:1) AA: or shift the background to #ababab (4.54:1) AAA: or shift the background to #d4d4d4 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40403b 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

f4a6a0 a8d8ea ffd97d fef9f3 4a3f3a

Nursery

Open in tool →

Pastel coral, sky and butter — soft enough for a newborn brand, with warm brown text instead of harsh black.

Light Muted FriendlyKids

Fonts for this mood

#40403b reads as neutral, dark, luxury. The font library is tagged with the same vocabulary:

Neutral fonts →Luxury fonts →Bold fonts →

mcpConnect your agent — build around #40403b

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 #40403b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40403b-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