Color

#313154

#313154
hex#313154
rgbrgb(49, 49, 84)
hslhsl(240, 26%, 26%)
oklchoklch(0.331 0.061 282.5)
Closest name: Deep Sea Base (#2c2c57)Relative luminance 0.0349

Colors that go with #313154

Dark Olive Green, Steel Blue and Blush Pink 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 #313154

Tints & shades

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

Harmonies

Complementary

Open in tool →

#545431

#314254 · #423154

#543131 · #315431

Split-complementary

Open in tool →

#544231 · #425431

#543142 · #545431 · #315442

Contrast

#313154 as textRatioAAAA largeAAAFix
Aaon white
12.37:1passpasspassPasses AAA — no fix needed.
Aaon black
1.7:1failfailfail
  • AA: use #7272ac as the text (4.72:1)
  • AAA: use #9292bf as the text (7.09:1)
  • AA: or shift the background to #9c9c9c (4.5:1)
  • AAA: or shift the background to #c4c4c4 (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 #313154 as the background.

Brands using this color

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

Fonts for this mood

#313154 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #313154
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 #313154 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/313154-a19cc4-df994e-251f2d-e9edf1?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