Color

#301f4c

#301f4c
hex#301f4c
rgbrgb(48, 31, 76)
hslhsl(263, 42%, 21%)
oklchoklch(0.285 0.081 298.6)
Closest name: Midnight Velvet (#2a2243)Relative luminance 0.0213

Colors that go with #301f4c

Charcoal, Dark Olive Green and Royal Blue 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 →

#3b4c1f

#1f244c · #471f4c

#4c301f · #1f4c30

Split-complementary

Open in tool →

#4c471f · #244c1f

#4c1f24 · #3b4c1f · #1f4c47

Contrast

#301f4c as textRatioAAAA largeAAAFix
Aaon white
14.73:1passpasspassPasses AAA — no fix needed.
Aaon black
1.43:1failfailfail
  • AA: use #8763bf as the text (4.57:1)
  • AAA: use #a58bd0 as the text (7.2:1)
  • AA: or shift the background to #8f8f8f (4.55:1)
  • AAA: or shift the background to #b3b3b3 (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 #301f4c as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

Fonts for this mood

#301f4c reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #301f4c
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 #301f4c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/301f4c-b09cc4-dfd04e-2b1f2d-e9eaf1?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