Color

#042b86

#042b86
hex#042b86
rgbrgb(4, 43, 134)
hslhsl(222, 94%, 27%)
oklchoklch(0.336 0.157 263)
Closest name: Below the Surface (#0a2f7c)Relative luminance 0.0347

Colors that go with #042b86

Charcoal, Crimson 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 →

#865f04

#046c86 · #1e0486

#86042b · #2b8604

Split-complementary

Open in tool →

#861e04 · #6c8604

#86046c · #865f04 · #04861e

Contrast

#042b86 as textRatioAAAA largeAAAFix
Aaon white
12.39:1passpasspassPasses AAA — no fix needed.
Aaon black
1.69:1failfailfail
  • AA: use #2f6cf9 as the text (4.63:1)
  • AAA: use #6692fa as the text (7.06:1)
  • AA: or shift the background to #9c9c9c (4.51:1)
  • AAA: or shift the background to #c4c4c4 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #042b86 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#042b86 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #042b86
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 #042b86 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/042b86-9ca3c4-df6e4e-211f2d-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