Color

#375a5c

#375a5c
hex#375a5c
rgbrgb(55, 90, 92)
hslhsl(183, 25%, 29%)
oklchoklch(0.442 0.041 200.4)
Closest name: Arctic Nights (#345c61)Relative luminance 0.089

Colors that go with #375a5c

Sienna, Blue and Cadet 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.

Real palettes that use #375a5c

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5c3937

#375c4c · #37485c

#5c375b · #5b5c37

Split-complementary

Open in tool →

#5c3748 · #5c4c37

#4c375c · #5c3937 · #485c37

Contrast

#375a5c as textRatioAAAA largeAAAFix
Aaon white
7.56:1passpasspassPasses AAA — no fix needed.
Aaon black
2.78:1failfailfail
  • AA: use #4d7d80 as the text (4.56:1)
  • AAA: use #66a0a3 as the text (7.12:1)
  • AA: or shift the background to #c9c9c9 (4.56:1)
  • AAA: or shift the background to #f7f7f7 (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 #375a5c 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

#375a5c reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #375a5c
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 #375a5c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/375a5c-a2b9be-d4598e-1f262d-e9f1ee?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