Color

#333a42

#333a42
hex#333a42
rgbrgb(51, 58, 66)
hslhsl(212, 13%, 23%)
oklchoklch(0.345 0.017 251.8)
Closest name: Artist’s Charcoal (#37393e)Relative luminance 0.0412

Tints & shades

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

Harmonies

Complementary

Open in tool →

#423b33

#334242 · #343342

#42333a · #3a4233

Split-complementary

Open in tool →

#423433 · #424233

#423342 · #423b33 · #334234

Contrast

#333a42 as textRatioAAAA largeAAAFix
Aaon white
11.51:1passpasspassPasses AAA — no fix needed.
Aaon black
1.82:1failfailfail
  • AA: use #687787 as the text (4.58:1)
  • AAA: use #8c98a6 as the text (7.16:1)
  • AA: or shift the background to #a3a3a3 (4.56:1)
  • AAA: or shift the background to #cccccc (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #333a42 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

#333a42 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #333a42
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 #333a42 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/333a42-9caac4-df564e-1f202d-e9f1f1?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