Color

#3fab67

#3fab67
hex#3fab67
rgbrgb(63, 171, 103)
hslhsl(142, 46%, 46%)
oklchoklch(0.662 0.141 152.5)
Closest name: mediumseagreen (#3cb371)Relative luminance 0.3116

Colors that go with #3fab67

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 →

#ab3f84

#4eab3f · #3fab9d

#673fab · #ab673f

Split-complementary

Open in tool →

#9d3fab · #ab3f4e

#3f4eab · #ab3f84 · #ab9d3f

Contrast

#3fab67 as textRatioAAAA largeAAAFix
Aaon white
2.9:1failfailfail
  • AA: use #328651 as the text (4.5:1)
  • AAA: use #24613a as the text (7.38:1)
  • AA: or shift the background to #303030 (4.55:1)
  • AAA: or shift the background to #050505 (7.02:1)
Aaon black
7.23:1passpasspassPasses 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 #3fab67 as the background.

Brands using this color

mcpConnect your agent — build around #3fab67
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 #3fab67 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fab67-a2beaf-c659d4-1f2d2a-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