Color

#243d3b

#243d3b
hex#243d3b
rgbrgb(36, 61, 59)
hslhsl(175, 26%, 19%)
oklchoklch(0.339 0.031 189.4)
Closest name: Sunken Harbour (#1c3d44)Relative luminance 0.0403

Colors that go with #243d3b

Sienna, Teal and Amber 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 →

#3d2426

#243d2e · #24333d

#3b243d · #3d3b24

Split-complementary

Open in tool →

#3d2433 · #3d2e24

#2e243d · #3d2426 · #333d24

Contrast

#243d3b as textRatioAAAA largeAAAFix
Aaon white
11.63:1passpasspassPasses AAA — no fix needed.
Aaon black
1.81:1failfailfail
  • AA: use #4a7d79 as the text (4.5:1)
  • AAA: use #5ea19b as the text (7.05:1)
  • AA: or shift the background to #a1a1a1 (4.5:1)
  • AAA: or shift the background to #c9c9c9 (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 #243d3b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#243d3b reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #243d3b
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 #243d3b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/243d3b-a2bdbe-d4599f-1f282d-e9f1ed?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