Color

#375d5d

#375d5d
hex#375d5d
rgbrgb(55, 93, 93)
hslhsl(180, 26%, 29%)
oklchoklch(0.45 0.043 195.7)
Closest name: Arctic Nights (#345c61)Relative luminance 0.0943

Colors that go with #375d5d

Sienna, Cadet Blue and Copper 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.

Real palettes that use #375d5d

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#5d3737

#375d4a · #374a5d

#5d375d · #5d5d37

Split-complementary

Open in tool →

#5d374a · #5d4a37

#4a375d · #5d3737 · #4a5d37

Contrast

#375d5d as textRatioAAAA largeAAAFix
Aaon white
7.28:1passpasspassPasses AAA — no fix needed.
Aaon black
2.89:1failfailfail
  • AA: use #4a7d7d as the text (4.52:1)
  • AAA: use #5ea1a1 as the text (7.09:1)
  • AA: or shift the background to #cccccc (4.53:1)
  • AAA: or shift the background to #fcfcfc (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #375d5d as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#375d5d reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #375d5d
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 #375d5d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/375d5d-a2bbbe-d45994-1f272d-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