Color

#28a457

#28a457
hex#28a457
rgbrgb(40, 164, 87)
hslhsl(143, 61%, 40%)
oklchoklch(0.635 0.155 151.1)
Closest name: Jade (#00a86b)Relative luminance 0.2769

Colors that go with #28a457

Charcoal, Blue and Crimson lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#a42875

#36a428 · #28a496

#5728a4 · #a45728

Split-complementary

Open in tool →

#9628a4 · #a42836

#2836a4 · #a42875 · #a49628

Contrast

#28a457 as textRatioAAAA largeAAAFix
Aaon white
3.21:1failpassfail
  • AA: use #218748 as the text (4.54:1)
  • AAA: use #186334 as the text (7.31:1)
  • AA: or shift the background to #292929 (4.53:1)
Aaon black
6.54:1passpassfail
  • AAA: use #2aac5c as the text (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #28a457 as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #28a457
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #28a457 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/28a457-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