Color

#04599a

#04599a
hex#04599a
rgbrgb(4, 89, 154)
hslhsl(206, 95%, 31%)
oklchoklch(0.456 0.127 249.9)
Closest name: Blue Chip (#1d5699)Relative luminance 0.095

Colors that go with #04599a

Charcoal, Crimson and Sienna 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 →

#9a4504

#049a90 · #040e9a

#9a0459 · #599a04

Split-complementary

Open in tool →

#9a040e · #9a9004

#90049a · #9a4504 · #0e9a04

Contrast

#04599a as textRatioAAAA largeAAAFix
Aaon white
7.24:1passpasspassPasses AAA — no fix needed.
Aaon black
2.9:1failfailfail
  • AA: use #0579d1 as the text (4.66:1)
  • AAA: use #1f9bf9 as the text (7.11:1)
  • AA: or shift the background to #cccccc (4.51:1)
  • AAA: or shift the background to #fcfcfc (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #04599a as the background.

Brands using this color

Fonts for this mood

#04599a reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #04599a
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 #04599a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/04599a-9caec4-df4e56-1f212d-e9f1f1?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