Color

#233b4d

#233b4d
hex#233b4d
rgbrgb(35, 59, 77)
hslhsl(206, 37%, 22%)
oklchoklch(0.341 0.044 242)
Closest name: Astral Nomad (#203943)Relative luminance 0.0402

Colors that go with #233b4d

Dark Olive Green, Teal 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 →

#4d3523

#234d4a · #23264d

#4d233b · #3b4d23

Split-complementary

Open in tool →

#4d2326 · #4d4a23

#4a234d · #4d3523 · #264d23

Contrast

#233b4d as textRatioAAAA largeAAAFix
Aaon white
11.64:1passpasspassPasses AAA — no fix needed.
Aaon black
1.8:1failfailfail
  • AA: use #4a7ba1 as the text (4.64:1)
  • AAA: use #709cbd as the text (7.18:1)
  • AA: or shift the background to #a1a1a1 (4.51:1)
  • AAA: or shift the background to #c9c9c9 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #233b4d as the background.

Brands using this color

Fonts for this mood

#233b4d reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #233b4d
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 #233b4d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/233b4d-9caec4-df4e56-1f212d-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