Color

#031a4e

#031a4e
hex#031a4e
rgbrgb(3, 26, 78)
hslhsl(222, 93%, 16%)
oklchoklch(0.241 0.1 262.3)
Closest name: Interstellar Blue (#001155)Relative luminance 0.0131

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4f3803

#03404f · #12034f

#4f031a · #1a4f03

Split-complementary

Open in tool →

#4f1203 · #404f03

#4f0340 · #4f3803 · #034f12

Contrast

#031a4e as textRatioAAAA largeAAAFix
Aaon white
16.64:1passpasspassPasses AAA — no fix needed.
Aaon black
1.26:1failfailfail
  • AA: use #306cf8 as the text (4.63:1)
  • AAA: use #6693f9 as the text (7.11:1)
  • AA: or shift the background to #858585 (4.51:1)
  • AAA: or shift the background to #ababab (7.25:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #031a4e 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

#031a4e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #031a4e
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 #031a4e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/031a4e-9ca3c4-df6e4e-211f2d-e9eff1?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