Color

#0d403c

#0d403c
hex#0d403c
rgbrgb(13, 64, 60)
hslhsl(175, 66%, 15%)
oklchoklch(0.338 0.052 187.3)
Closest name: Botanical Night (#12403c)Relative luminance 0.0408

Colors that go with #0d403c

Crimson, Sea Green 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 →

#3f0d11

#0d3f22 · #0d2a3f

#3b0d3f · #3f3b0d

Split-complementary

Open in tool →

#3f0d2a · #3f220d

#220d3f · #3f0d11 · #2a3f0d

Contrast

#0d403c as textRatioAAAA largeAAAFix
Aaon white
11.57:1passpasspassPasses AAA — no fix needed.
Aaon black
1.82:1failfailfail
  • AA: use #1b837b as the text (4.58:1)
  • AAA: use #23a99e as the text (7.24:1)
  • AA: or shift the background to #a3a3a3 (4.58:1)
  • AAA: or shift the background to #cccccc (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0d403c as the background.

Brands using this color

Fonts for this mood

#0d403c reads as vivid, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0d403c
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 #0d403c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0d403c-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