Color

#033a3f

#033a3f
hex#033a3f
rgbrgb(3, 58, 63)
hslhsl(185, 91%, 13%)
oklchoklch(0.319 0.053 204.6)
Closest name: Royal Neptune (#1c3b42)Relative luminance 0.034

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f0803

#033f26 · #031c3f

#3f033a · #3a3f03

Split-complementary

Open in tool →

#3f031c · #3f2603

#26033f · #3f0803 · #1c3f03

Contrast

#033a3f as textRatioAAAA largeAAAFix
Aaon white
12.49:1passpasspassPasses AAA — no fix needed.
Aaon black
1.68:1failfailfail
  • AA: use #07828d as the text (4.59:1)
  • AAA: use #08a6b4 as the text (7.12:1)
  • AA: or shift the background to #9c9c9c (4.55:1)
  • AAA: or shift the background to #c2c2c2 (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 #033a3f as the background.

Brands using this color

Fonts for this mood

#033a3f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #033a3f
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 #033a3f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/033a3f-a2b8be-df4e88-1f262d-e9f1ee?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