Color

#04255d

#04255d
hex#04255d
rgbrgb(4, 37, 93)
hslhsl(218, 92%, 19%)
oklchoklch(0.282 0.107 260.3)
Closest name: Black Sea Night (#052462)Relative luminance 0.0214

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5d3c04

#04515d · #10045d

#5d0425 · #255d04

Split-complementary

Open in tool →

#5d1004 · #515d04

#5d0451 · #5d3c04 · #045d10

Contrast

#04255d as textRatioAAAA largeAAAFix
Aaon white
14.71:1passpasspassPasses AAA — no fix needed.
Aaon black
1.43:1failfailfail
  • AA: use #1e6df6 as the text (4.57:1)
  • AAA: use #5d96f8 as the text (7.18:1)
  • AA: or shift the background to #8f8f8f (4.55:1)
  • AAA: or shift the background to #b3b3b3 (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 #04255d 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

#04255d reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #04255d
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 #04255d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/04255d-9ca6c4-df644e-201f2d-e9f0f1?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