Color

#28a451

#28a451
hex#28a451
rgbrgb(40, 164, 81)
hslhsl(140, 61%, 40%)
oklchoklch(0.634 0.161 149.6)
Closest name: Fennel Fiasco (#00aa44)Relative luminance 0.276

Colors that go with #28a451

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 →

#a4287b

#3da428 · #28a48f

#5128a4 · #a45128

Split-complementary

Open in tool →

#8f28a4 · #a4283d

#283da4 · #a4287b · #a48f28

Contrast

#28a451 as textRatioAAAA largeAAAFix
Aaon white
3.22:1failpassfail
  • AA: use #218743 as the text (4.55:1)
  • AAA: use #186331 as the text (7.32:1)
  • AA: or shift the background to #292929 (4.52:1)
Aaon black
6.52:1passpassfail
  • AAA: use #2aac55 as the text (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #28a451 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

mcpConnect your agent — build around #28a451
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 #28a451 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/28a451-a2beaf-c259d4-1f2d2a-ebf1e9?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