Color

#333d42

#333d42
hex#333d42
rgbrgb(51, 61, 66)
hslhsl(200, 13%, 23%)
oklchoklch(0.353 0.016 229.4)
Closest name: Artist’s Charcoal (#37393e)Relative luminance 0.0443

Tints & shades

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

Harmonies

Complementary

Open in tool →

#423833

#334240 · #333642

#42333d · #3d4233

Split-complementary

Open in tool →

#423336 · #424033

#403342 · #423833 · #364233

Contrast

#333d42 as textRatioAAAA largeAAAFix
Aaon white
11.13:1passpasspassPasses AAA — no fix needed.
Aaon black
1.89:1failfailfail
  • AA: use #647882 as the text (4.55:1)
  • AAA: use #8699a2 as the text (7.09:1)
  • AA: or shift the background to #a6a6a6 (4.57:1)
  • AAA: or shift the background to #cfcfcf (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #333d42 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

#333d42 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #333d42
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 #333d42 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/333d42-9cb2c4-df4e64-1f232d-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