Color

#3fc687

#3fc687
hex#3fc687
rgbrgb(63, 198, 135)
hslhsl(152, 54%, 51%)
oklchoklch(0.738 0.148 158.7)
Closest name: Emerald Green (#50c878)Relative luminance 0.4319

Colors that go with #3fc687

Charcoal, Blue and Cornflower 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 →

#c63f7e

#3fc643 · #3fc1c6

#873fc6 · #c6873f

Split-complementary

Open in tool →

#c63fc1 · #c6433f

#433fc6 · #c63f7e · #c1c63f

Contrast

#3fc687 as textRatioAAAA largeAAAFix
Aaon white
2.18:1failfailfail
  • AA: use #28865a as the text (4.52:1)
  • AAA: use #1d6242 as the text (7.3:1)
  • AA: or shift the background to #424242 (4.61:1)
  • AAA: or shift the background to #242424 (7.12:1)
Aaon black
9.64:1passpasspassPasses 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 #3fc687 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #3fc687
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 #3fc687 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fc687-a2beb4-d459ce-1f2d2d-e9f1ea?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