Color

#5bcd81

#5bcd81
hex#5bcd81
rgbrgb(91, 205, 129)
hslhsl(140, 53%, 58%)
oklchoklch(0.763 0.151 152.1)
Closest name: Emerald Green (#50c878)Relative luminance 0.4747

Colors that go with #5bcd81

Charcoal, Deep Sky Blue and Mustard Yellow 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 →

#cd5ba7

#6ecd5b · #5bcdba

#815bcd · #cd815b

Split-complementary

Open in tool →

#ba5bcd · #cd5b6e

#5b6ecd · #cd5ba7 · #cdba5b

Contrast

#5bcd81 as textRatioAAAA largeAAAFix
Aaon white
2:1failfailfail
  • AA: use #298547 as the text (4.63:1)
  • AAA: use #1f6537 as the text (7.06:1)
  • AA: or shift the background to #474747 (4.64:1)
  • AAA: or shift the background to #2b2b2b (7.08:1)
Aaon black
10.49:1passpasspassPasses 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 #5bcd81 as the background.

Brands using this color

mcpConnect your agent — build around #5bcd81
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 #5bcd81 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5bcd81-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