Color

#3a375c

#3a375c
hex#3a375c
rgbrgb(58, 55, 92)
hslhsl(245, 25%, 29%)
oklchoklch(0.358 0.063 286.4)
Closest name: Call It a Night (#42364c)Relative luminance 0.044

Colors that go with #3a375c

Sea Green, Steel Blue and Teal 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 →

#595c37

#37475c · #4d375c

#5c3b37 · #375c3b

Split-complementary

Open in tool →

#5c4d37 · #475c37

#5c3747 · #595c37 · #375c4d

Contrast

#3a375c as textRatioAAAA largeAAAFix
Aaon white
11.16:1passpasspassPasses AAA — no fix needed.
Aaon black
1.88:1failfailfail
  • AA: use #7470a9 as the text (4.63:1)
  • AAA: use #9693be as the text (7.21:1)
  • AA: or shift the background to #a6a6a6 (4.59:1)
  • AAA: or shift the background to #cfcfcf (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3a375c as the background.

Brands using this color

Fonts for this mood

#3a375c reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3a375c
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 #3a375c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3a375c-a49cc4-dfa54e-261f2d-e9ecf1?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