Color

#303a3b

#303a3b
hex#303a3b
rgbrgb(48, 58, 59)
hslhsl(185, 10%, 21%)
oklchoklch(0.34 0.013 203.9)
Closest name: Artist’s Charcoal (#37393e)Relative luminance 0.0397

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#3b3130

#303b36 · #30353b

#3b303a · #3a3b30

Split-complementary

Open in tool →

#3b3035 · #3b3630

#36303b · #3b3130 · #353b30

Contrast

#303a3b as textRatioAAAA largeAAAFix
Aaon white
11.71:1passpasspassPasses AAA — no fix needed.
Aaon black
1.79:1failfailfail
  • AA: use #657a7b as the text (4.62:1)
  • AAA: use #869a9c as the text (7.12:1)
  • AA: or shift the background to #a1a1a1 (4.53:1)
  • AAA: or shift the background to #c9c9c9 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #303a3b as the background.

Brands using this color

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

Fonts for this mood

#303a3b reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #303a3b
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #303a3b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/303a3b-a2b8be-df4e88-1f262d-e9f1ee?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