Color

#30213b

#30213b
hex#30213b
rgbrgb(48, 33, 59)
hslhsl(275, 28%, 18%)
oklchoklch(0.278 0.051 309.9)
Closest name: Midnight Velvet (#2a2243)Relative luminance 0.0203

Colors that go with #30213b

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 →

#2c3b21

#23213b · #3b2139

#3b3021 · #213b30

Split-complementary

Open in tool →

#393b21 · #213b23

#3b2321 · #2c3b21 · #21393b

Contrast

#30213b as textRatioAAAA largeAAAFix
Aaon white
14.93:1passpasspassPasses AAA — no fix needed.
Aaon black
1.41:1failfailfail
  • AA: use #8d66a9 as the text (4.61:1)
  • AAA: use #aa8dbf as the text (7.27:1)
  • AA: or shift the background to #8f8f8f (4.62:1)
  • AAA: or shift the background to #b3b3b3 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #30213b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#30213b reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #30213b
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 #30213b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/30213b-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