Color

#30404a

#30404a
hex#30404a
rgbrgb(48, 64, 74)
hslhsl(203, 21%, 24%)
oklchoklch(0.362 0.027 235.9)
Closest name: Charcoal (#36454f)Relative luminance 0.0479

Colors that go with #30404a

Amber, Blue and Blush Pink 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 →

#4a3a30

#304a47 · #30334a

#4a3040 · #404a30

Split-complementary

Open in tool →

#4a3033 · #4a4730

#47304a · #4a3a30 · #334a30

Contrast

#30404a as textRatioAAAA largeAAAFix
Aaon white
10.73:1passpasspassPasses AAA — no fix needed.
Aaon black
1.96:1failfailfail
  • AA: use #5b788b as the text (4.5:1)
  • AAA: use #7d99aa as the text (7.01:1)
  • AA: or shift the background to #a8a8a8 (4.51:1)
  • AAA: or shift the background to #d1d1d1 (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 #30404a as the background.

Brands using this color

Fonts for this mood

#30404a reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #30404a
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 #30404a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/30404a-9cb0c4-df4e5d-1f222d-e9f1f0?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