Color

#034fd3

#034fd3
hex#034fd3
rgbrgb(3, 79, 211)
hslhsl(218, 97%, 42%)
oklchoklch(0.481 0.213 261.6)
Closest name: Denim (#1560bd)Relative luminance 0.1031

Colors that go with #034fd3

Charcoal, Crimson and Amber 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 →

#d38703

#03b7d3 · #1f03d3

#d3034f · #4fd303

Split-complementary

Open in tool →

#d31f03 · #b7d303

#d303b7 · #d38703 · #03d31f

Contrast

#034fd3 as textRatioAAAA largeAAAFix
Aaon white
6.86:1passpassfail
  • AAA: use #034ece as the text (7.04:1)
Aaon black
3.06:1failpassfail
  • AA: use #186bfb as the text (4.53:1)
  • AAA: use #5995fc as the text (7.13:1)
  • AA: or shift the background to #d4d4d4 (4.63:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #034fd3 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#034fd3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #034fd3
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 #034fd3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/034fd3-9ca6c4-df644e-201f2d-e9f0f1?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