Color

#04538b

#04538b
hex#04538b
rgbrgb(4, 83, 139)
hslhsl(205, 94%, 28%)
oklchoklch(0.432 0.114 248)
Closest name: Beyond the Sea (#005784)Relative luminance 0.0808

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8b3c04

#048b7f · #040f8b

#8b0453 · #538b04

Split-complementary

Open in tool →

#8b040f · #8b7f04

#7f048b · #8b3c04 · #0f8b04

Contrast

#04538b as textRatioAAAA largeAAAFix
Aaon white
8.03:1passpasspassPasses AAA — no fix needed.
Aaon black
2.62:1failfailfail
  • AA: use #0679cb as the text (4.61:1)
  • AAA: use #169af8 as the text (7.01:1)
  • AA: or shift the background to #c2c2c2 (4.51:1)
  • AAA: or shift the background to #f0f0f0 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #04538b 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

#04538b reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #04538b
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 #04538b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/04538b-9cafc4-df4e58-1f212d-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