Color

#063a42

#063a42
hex#063a42
rgbrgb(6, 58, 66)
hslhsl(188, 83%, 14%)
oklchoklch(0.321 0.052 210.8)
Closest name: Royal Neptune (#1c3b42)Relative luminance 0.0346

Colors that go with #063a42

Rust, Sienna and Steel Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#410e06

#06412c · #061c41

#410639 · #394106

Split-complementary

Open in tool →

#41061c · #412c06

#2c0641 · #410e06 · #1c4106

Contrast

#063a42 as textRatioAAAA largeAAAFix
Aaon white
12.41:1passpasspassPasses AAA — no fix needed.
Aaon black
1.69:1failfailfail
  • AA: use #0e8395 as the text (4.7:1)
  • AAA: use #11a4bb as the text (7.05:1)
  • AA: or shift the background to #9c9c9c (4.52:1)
  • AAA: or shift the background to #c4c4c4 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #063a42 as the background.

Brands using this color

Fonts for this mood

#063a42 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #063a42
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #063a42 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/063a42-a2b7be-df4e81-1f252d-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