Color

#243e4c

#243e4c
hex#243e4c
rgbrgb(36, 62, 76)
hslhsl(201, 36%, 22%)
oklchoklch(0.349 0.04 233.1)
Closest name: Cold and Dark (#154250)Relative luminance 0.0434

Colors that go with #243e4c

Dark Olive Green, Royal Blue and Teal 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 →

#4c3224

#244c46 · #242a4c

#4c243e · #3e4c24

Split-complementary

Open in tool →

#4c242a · #4c4624

#46244c · #4c3224 · #2a4c24

Contrast

#243e4c as textRatioAAAA largeAAAFix
Aaon white
11.24:1passpasspassPasses AAA — no fix needed.
Aaon black
1.87:1failfailfail
  • AA: use #487c99 as the text (4.62:1)
  • AAA: use #6a9db9 as the text (7.14:1)
  • AA: or shift the background to #a6a6a6 (4.62:1)
  • AAA: or shift the background to #cfcfcf (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #243e4c 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

#243e4c reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #243e4c
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 #243e4c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/243e4c-9cb1c4-df4e62-1f222d-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