Color

#243d52

#243d52
hex#243d52
rgbrgb(36, 61, 82)
hslhsl(207, 39%, 23%)
oklchoklch(0.35 0.048 245.1)
Closest name: Capital Blue (#1a4157)Relative luminance 0.0432

Colors that go with #243d52

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 →

#523824

#24524f · #242652

#52243d · #3d5224

Split-complementary

Open in tool →

#522426 · #524f24

#4f2452 · #523824 · #265224

Contrast

#243d52 as textRatioAAAA largeAAAFix
Aaon white
11.26:1passpasspassPasses AAA — no fix needed.
Aaon black
1.86:1failfailfail
  • AA: use #487aa3 as the text (4.59:1)
  • AAA: use #6e9bbf as the text (7.1:1)
  • AA: or shift the background to #a6a6a6 (4.63:1)
  • AAA: or shift the background to #cccccc (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #243d52 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

#243d52 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #243d52
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 #243d52 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/243d52-9cadc4-df4e53-1f212d-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