Color

#301d3e

#301d3e
hex#301d3e
rgbrgb(48, 29, 62)
hslhsl(275, 36%, 18%)
oklchoklch(0.272 0.063 309.3)
Closest name: Midnight Velvet (#2a2243)Relative luminance 0.0185

Colors that go with #301d3e

Charcoal, Dark Olive Green 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 →

#2b3e1d

#201d3e · #3e1d3c

#3e311d · #1d3e31

Split-complementary

Open in tool →

#3c3e1d · #1d3e20

#3e201d · #2b3e1d · #1d3c3e

Contrast

#301d3e as textRatioAAAA largeAAAFix
Aaon white
15.32:1passpasspassPasses AAA — no fix needed.
Aaon black
1.37:1failfailfail
  • AA: use #9363b6 as the text (4.7:1)
  • AAA: use #ae89c8 as the text (7.21:1)
  • AA: or shift the background to #8c8c8c (4.56:1)
  • AAA: or shift the background to #b0b0b0 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #301d3e as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#301d3e reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #301d3e
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 #301d3e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/301d3e-b89cc4-c0cb62-2d1f2d-eae9f1?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