Color

#033f40

#033f40
hex#033f40
rgbrgb(3, 63, 64)
hslhsl(181, 91%, 13%)
oklchoklch(0.334 0.055 196.7)
Closest name: Rich Black (#004040)Relative luminance 0.0394

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f0403

#033f22 · #03203f

#3f033e · #3e3f03

Split-complementary

Open in tool →

#3f0320 · #3f2203

#22033f · #3f0403 · #203f03

Contrast

#033f40 as textRatioAAAA largeAAAFix
Aaon white
11.74:1passpasspassPasses AAA — no fix needed.
Aaon black
1.79:1failfailfail
  • AA: use #068688 as the text (4.77:1)
  • AAA: use #08a8aa as the text (7.19:1)
  • AA: or shift the background to #a1a1a1 (4.54:1)
  • AAA: or shift the background to #c9c9c9 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #033f40 as the background.

Brands using this color

Fonts for this mood

#033f40 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #033f40
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 #033f40 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/033f40-a2babe-d45992-1f272d-e9f1ed?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