Color

#04558b

#04558b
hex#04558b
rgbrgb(4, 85, 139)
hslhsl(204, 94%, 28%)
oklchoklch(0.437 0.112 246.6)
Closest name: Beyond the Sea (#005784)Relative luminance 0.0839

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#8b3a04

#048b7d · #04128b

#8b0455 · #558b04

Split-complementary

Open in tool →

#8b0412 · #8b7d04

#7d048b · #8b3a04 · #128b04

Contrast

#04558b as textRatioAAAA largeAAAFix
Aaon white
7.84:1passpasspassPasses AAA — no fix needed.
Aaon black
2.68:1failfailfail
  • AA: use #0679c6 as the text (4.56:1)
  • AAA: use #129cf8 as the text (7.14:1)
  • AA: or shift the background to #c7c7c7 (4.64:1)
  • AAA: or shift the background to #f2f2f2 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #04558b 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

#04558b reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #04558b
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #04558b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/04558b-9cafc4-df4e5a-1f222d-e9f1f0?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