Color

#377b7a

#377b7a
hex#377b7a
rgbrgb(55, 123, 122)
hslhsl(179, 38%, 35%)
oklchoklch(0.539 0.069 194)
Closest name: Green Sleeves (#39766c)Relative luminance 0.1638

Colors that go with #377b7a

Charcoal, Crimson and Amber 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 →

#7b3738

#377b58 · #375a7b

#7a377b · #7b7a37

Split-complementary

Open in tool →

#7b375a · #7b5837

#58377b · #7b3738 · #5a7b37

Contrast

#377b7a as textRatioAAAA largeAAAFix
Aaon white
4.91:1passpassfail
  • AAA: use #2b5f5e as the text (7.24:1)
Aaon black
4.28:1failpassfail
  • AA: use #397f7e as the text (4.51:1)
  • AAA: use #4aa5a4 as the text (7.21:1)
  • AA: or shift the background to #f5f5f5 (4.5:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #377b7a 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 #377b7a
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 #377b7a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/377b7a-a2bbbe-d45996-1f272d-e9f1ed?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