Color

#283c52

#283c52
hex#283c52
rgbrgb(40, 60, 82)
hslhsl(211, 34%, 24%)
oklchoklch(0.35 0.046 251.5)
Closest name: Capital Blue (#1a4157)Relative luminance 0.0429

Colors that go with #283c52

Dark Olive Green, Sienna 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 #283c52

Tints & shades

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

Harmonies

Complementary

Open in tool →

#523e28

#285152 · #292852

#52283d · #3d5228

Split-complementary

Open in tool →

#522928 · #515228

#522851 · #523e28 · #285229

Contrast

#283c52 as textRatioAAAA largeAAAFix
Aaon white
11.3:1passpasspassPasses AAA — no fix needed.
Aaon black
1.86:1failfailfail
  • AA: use #5179a4 as the text (4.62:1)
  • AAA: use #7a9abd as the text (7.18:1)
  • AA: or shift the background to #a6a6a6 (4.64:1)
  • AAA: or shift the background to #cccccc (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #283c52 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

#283c52 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283c52
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 #283c52 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283c52-9cabc4-df534e-1f202d-e9f1f1?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