#40b540 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	2.66:1	fail	fail	fail	AA: use #2e842e as the text (4.71:1) AAA: use #226222 as the text (7.4:1) AA: or shift the background to #363636 (4.55:1) AAA: or shift the background to #121212 (7.05:1)
Aaon black	7.9:1	pass	pass	pass	Passes AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40b540 as the background.

Brands using this color

Spotifyprimary · #1db954 · Δ1.976

Palettes built around it

3fb950 58a6ff f778ba 0b0f14 e6edf3

Terminal

Open in tool →

Green for success, blue for links, pink for emphasis — the dark-mode developer family, tuned to sit on near-black without glare.

Technical Dark Modern

mcpConnect your agent — build around #40b540

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 #40b540 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40b540-a2bea5-994edf-1f2d25-edf1e9?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