Color

#03434e

#03434e
hex#03434e
rgbrgb(3, 67, 78)
hslhsl(189, 93%, 16%)
oklchoklch(0.352 0.06 213.4)
Closest name: Cold and Dark (#154250)Relative luminance 0.0458

Colors that go with #03434e

Steel Blue, Teal and Rust 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 →

#4f0e03

#034f34 · #031d4f

#4f0343 · #434f03

Split-complementary

Open in tool →

#4f031d · #4f3403

#34034f · #4f0e03 · #1d4f03

Contrast

#03434e as textRatioAAAA largeAAAFix
Aaon white
10.96:1passpasspassPasses AAA — no fix needed.
Aaon black
1.92:1failfailfail
  • AA: use #068399 as the text (4.71:1)
  • AAA: use #07a4c0 as the text (7.08:1)
  • AA: or shift the background to #a6a6a6 (4.5:1)
  • AAA: or shift the background to #cfcfcf (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #03434e as the background.

Brands using this color

Fonts for this mood

#03434e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #03434e
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 #03434e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/03434e-a2b7be-df4e7e-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