Color

#3bb56c

#3bb56c
hex#3bb56c
rgbrgb(59, 181, 108)
hslhsl(144, 51%, 47%)
oklchoklch(0.688 0.152 153.1)
Closest name: mediumseagreen (#3cb371)Relative luminance 0.3506

Colors that go with #3bb56c

Charcoal, Mustard Yellow and Royal Blue 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 →

#b53b84

#47b53b · #3bb5a9

#6c3bb5 · #b56c3b

Split-complementary

Open in tool →

#a93bb5 · #b53b47

#3b47b5 · #b53b84 · #b5a93b

Contrast

#3bb56c as textRatioAAAA largeAAAFix
Aaon white
2.62:1failfailfail
  • AA: use #2a834e as the text (4.71:1)
  • AAA: use #20643c as the text (7.12:1)
  • AA: or shift the background to #363636 (4.61:1)
  • AAA: or shift the background to #141414 (7.03:1)
Aaon black
8.01:1passpasspassPasses 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 #3bb56c as the background.

Brands using this color

mcpConnect your agent — build around #3bb56c
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 #3bb56c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3bb56c-a2beb0-ca59d4-1f2d2b-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