Color

#1c403f

#1c403f
hex#1c403f
rgbrgb(28, 64, 63)
hslhsl(178, 39%, 18%)
oklchoklch(0.345 0.042 193)
Closest name: Botanical Night (#12403c)Relative luminance 0.0427

Colors that go with #1c403f

Sea Green, Teal and Indian Red 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 →

#401c1d

#1c402d · #1c2f40

#3f1c40 · #403f1c

Split-complementary

Open in tool →

#401c2f · #402d1c

#2d1c40 · #401c1d · #2f401c

Contrast

#1c403f as textRatioAAAA largeAAAFix
Aaon white
11.32:1passpasspassPasses AAA — no fix needed.
Aaon black
1.85:1failfailfail
  • AA: use #38807d as the text (4.55:1)
  • AAA: use #48a3a0 as the text (7.02:1)
  • AA: or shift the background to #a6a6a6 (4.65:1)
  • AAA: or shift the background to #cccccc (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1c403f as the background.

Brands using this color

Fonts for this mood

#1c403f reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1c403f
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 #1c403f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1c403f-a2bcbe-d45999-1f282d-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