Color

#031e63

#031e63
hex#031e63
rgbrgb(3, 30, 99)
hslhsl(223, 94%, 20%)
oklchoklch(0.272 0.126 263.2)
Closest name: Black Sea Night (#052462)Relative luminance 0.0185

Tints & shades

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

Harmonies

Complementary

Open in tool →

#634803

#034e63 · #180363

#63031e · #1e6303

Split-complementary

Open in tool →

#631803 · #4e6303

#63034e · #634803 · #036318

Contrast

#031e63 as textRatioAAAA largeAAAFix
Aaon white
15.33:1passpasspassPasses AAA — no fix needed.
Aaon black
1.37:1failfailfail
  • AA: use #346cf9 as the text (4.66:1)
  • AAA: use #6b93fa as the text (7.18:1)
  • AA: or shift the background to #8c8c8c (4.56:1)
  • AAA: or shift the background to #b0b0b0 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #031e63 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

#031e63 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #031e63
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 #031e63 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/031e63-9ca3c4-df704e-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