Color

#030b3f

#030b3f
hex#030b3f
rgbrgb(3, 11, 63)
hslhsl(232, 91%, 13%)
oklchoklch(0.191 0.098 266.3)
Closest name: Infinite Night (#071037)Relative luminance 0.0062

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f3703

#03293f · #19033f

#3f030b · #0b3f03

Split-complementary

Open in tool →

#3f1903 · #293f03

#3f0329 · #3f3703 · #033f19

Contrast

#030b3f as textRatioAAAA largeAAAFix
Aaon white
18.69:1passpasspassPasses AAA — no fix needed.
Aaon black
1.12:1failfailfail
  • AA: use #5066f7 as the text (4.58:1)
  • AAA: use #8090f9 as the text (7.28:1)
  • AA: or shift the background to #7d7d7d (4.54:1)
  • AAA: or shift the background to #a1a1a1 (7.23:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #030b3f as the background.

Brands using this color

Fonts for this mood

#030b3f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #030b3f
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 #030b3f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/030b3f-9c9dc4-df864e-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