Color

#333c42

#333c42
hex#333c42
rgbrgb(51, 60, 66)
hslhsl(204, 13%, 23%)
oklchoklch(0.35 0.016 237.1)
Closest name: Artist’s Charcoal (#37393e)Relative luminance 0.0433

Tints & shades

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

Harmonies

Complementary

Open in tool →

#423933

#334241 · #333542

#42333c · #3c4233

Split-complementary

Open in tool →

#423335 · #424133

#413342 · #423933 · #354233

Contrast

#333c42 as textRatioAAAA largeAAAFix
Aaon white
11.26:1passpasspassPasses AAA — no fix needed.
Aaon black
1.87:1failfailfail
  • AA: use #667885 as the text (4.59:1)
  • AAA: use #8999a4 as the text (7.16:1)
  • AA: or shift the background to #a6a6a6 (4.62:1)
  • AAA: or shift the background to #cccccc (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #333c42 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

#333c42 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #333c42
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 #333c42 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/333c42-9cafc4-df4e5a-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