Color

#3b875c

#3b875c
hex#3b875c
rgbrgb(59, 135, 92)
hslhsl(146, 39%, 38%)
oklchoklch(0.563 0.101 156.2)
Closest name: seagreen (#2e8b57)Relative luminance 0.1903

Colors that go with #3b875c

Charcoal, Royal Blue and Medium Violet Red 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 →

#873b66

#40873b · #3b8782

#5c3b87 · #875c3b

Split-complementary

Open in tool →

#823b87 · #873b40

#3b4087 · #873b66 · #87823b

Contrast

#3b875c as textRatioAAAA largeAAAFix
Aaon white
4.37:1failpassfail
  • AA: use #3a8359 as the text (4.59:1)
  • AAA: use #2c6344 as the text (7.06:1)
  • AA: or shift the background to #0a0a0a (4.53:1)
Aaon black
4.81:1passpassfail
  • AAA: use #49a772 as the text (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3b875c as the background.

Brands using this color

mcpConnect your agent — build around #3b875c
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 #3b875c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3b875c-a2beb1-ce59d4-1f2d2b-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