Color

#042aa4

#042aa4
hex#042aa4
rgbrgb(4, 42, 164)
hslhsl(226, 95%, 33%)
oklchoklch(0.368 0.196 264.1)
Closest name: Deepsea Kraken (#082599)Relative luminance 0.0436

Colors that go with #042aa4

Crimson, Steel Blue and 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 →

#a47f04

#0479a4 · #2f04a4

#a4042a · #2aa404

Split-complementary

Open in tool →

#a42f04 · #79a404

#a40479 · #a47f04 · #04a42f

Contrast

#042aa4 as textRatioAAAA largeAAAFix
Aaon white
11.22:1passpasspassPasses AAA — no fix needed.
Aaon black
1.87:1failfailfail
  • AA: use #3d69fa as the text (4.6:1)
  • AAA: use #6f90fb as the text (7.06:1)
  • AA: or shift the background to #a6a6a6 (4.61:1)
  • AAA: or shift the background to #cfcfcf (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #042aa4 as the background.

Brands using this color

Fonts for this mood

#042aa4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #042aa4
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 #042aa4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/042aa4-9ca1c4-df774e-221f2d-e9eff1?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