Color

#301b41

#301b41
hex#301b41
rgbrgb(48, 27, 65)
hslhsl(273, 41%, 18%)
oklchoklch(0.27 0.072 307.8)
Closest name: Midnight Velvet (#2a2243)Relative luminance 0.0179

Colors that go with #301b41

Charcoal, Dark Olive Green and Sea Green 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 →

#2c411b

#1d1b41 · #411b3f

#41301b · #1b4130

Split-complementary

Open in tool →

#3f411b · #1b411d

#411d1b · #2c411b · #1b3f41

Contrast

#301b41 as textRatioAAAA largeAAAFix
Aaon white
15.46:1passpasspassPasses AAA — no fix needed.
Aaon black
1.36:1failfailfail
  • AA: use #9361bd as the text (4.69:1)
  • AAA: use #ae88cd as the text (7.2:1)
  • AA: or shift the background to #8c8c8c (4.6:1)
  • AAA: or shift the background to #b0b0b0 (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #301b41 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

#301b41 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #301b41
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 #301b41 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/301b41-b79cc4-c4cb62-2d1f2d-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