Color

#030d3a

#030d3a
hex#030d3a
rgbrgb(3, 13, 58)
hslhsl(229, 90%, 12%)
oklchoklch(0.189 0.088 265.6)
Closest name: Infinite Night (#071037)Relative luminance 0.0061

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3a3003

#03293a · #15033a

#3a030d · #0d3a03

Split-complementary

Open in tool →

#3a1503 · #293a03

#3a0329 · #3a3003 · #033a15

Contrast

#030d3a as textRatioAAAA largeAAAFix
Aaon white
18.71:1passpasspassPasses AAA — no fix needed.
Aaon black
1.12:1failfailfail
  • AA: use #4767f5 as the text (4.53:1)
  • AAA: use #778ff8 as the text (7.07:1)
  • AA: or shift the background to #7d7d7d (4.54:1)
  • AAA: or shift the background to #a1a1a1 (7.24:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #030d3a 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

#030d3a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #030d3a
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 #030d3a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/030d3a-9c9fc4-df7e4e-231f2d-e9eef1?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