Color

#033f3f

#033f3f
hex#033f3f
rgbrgb(3, 63, 63)
hslhsl(180, 91%, 13%)
oklchoklch(0.334 0.055 194.8)
Closest name: Rich Black (#004040)Relative luminance 0.0393

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f0303

#033f21 · #03213f

#3f033f · #3f3f03

Split-complementary

Open in tool →

#3f0321 · #3f2103

#21033f · #3f0303 · #213f03

Contrast

#033f3f as textRatioAAAA largeAAAFix
Aaon white
11.75:1passpasspassPasses AAA — no fix needed.
Aaon black
1.79:1failfailfail
  • AA: use #068484 as the text (4.64:1)
  • AAA: use #08a6a6 as the text (7.02:1)
  • AA: or shift the background to #a1a1a1 (4.55:1)
  • AAA: or shift the background to #c9c9c9 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #033f3f as the background.

Brands using this color

Fonts for this mood

#033f3f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #033f3f
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 #033f3f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/033f3f-a2bbbe-d45994-1f272d-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