Color

#033a4a

#033a4a
hex#033a4a
rgbrgb(3, 58, 74)
hslhsl(194, 92%, 15%)
oklchoklch(0.324 0.059 223.7)
Closest name: Royal Neptune (#1c3b42)Relative luminance 0.0354

Colors that go with #033a4a

Crimson, Royal Blue and Teal 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 →

#491303

#034937 · #031649

#490339 · #394903

Split-complementary

Open in tool →

#490316 · #493703

#370349 · #491303 · #164903

Contrast

#033a4a as textRatioAAAA largeAAAFix
Aaon white
12.3:1passpasspassPasses AAA — no fix needed.
Aaon black
1.71:1failfailfail
  • AA: use #0781a6 as the text (4.7:1)
  • AAA: use #09a3d3 as the text (7.19:1)
  • AA: or shift the background to #9e9e9e (4.59:1)
  • AAA: or shift the background to #c4c4c4 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #033a4a as the background.

Brands using this color

Fonts for this mood

#033a4a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #033a4a
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 #033a4a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/033a4a-9cb6c4-df4e72-1f242d-e9f1ef?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