Color

#233a48

#233a48
hex#233a48
rgbrgb(35, 58, 72)
hslhsl(203, 35%, 21%)
oklchoklch(0.336 0.038 236.2)
Closest name: Astral Nomad (#203943)Relative luminance 0.0385

Colors that go with #233a48

Dark Olive Green, Royal Blue and Sienna 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 →

#483123

#234844 · #232748

#48233a · #3a4823

Split-complementary

Open in tool →

#482327 · #484423

#442348 · #483123 · #274823

Contrast

#233a48 as textRatioAAAA largeAAAFix
Aaon white
11.86:1passpasspassPasses AAA — no fix needed.
Aaon black
1.77:1failfailfail
  • AA: use #4b7c9b as the text (4.66:1)
  • AAA: use #6e9db9 as the text (7.19:1)
  • AA: or shift the background to #a1a1a1 (4.59:1)
  • AAA: or shift the background to #c7c7c7 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #233a48 as the background.

Brands using this color

Fonts for this mood

#233a48 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #233a48
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 #233a48 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/233a48-9cb0c4-df4e5d-1f222d-e9f1f0?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