Color

#031b86

#031b86
hex#031b86
rgbrgb(3, 27, 134)
hslhsl(229, 96%, 27%)
oklchoklch(0.309 0.175 264.6)
Closest name: darkblue (#00008b)Relative luminance 0.0252

Tints & shades

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

Harmonies

Complementary

Open in tool →

#876f03

#035d87 · #2d0387

#87031b · #1b8703

Split-complementary

Open in tool →

#872d03 · #5d8703

#87035d · #876f03 · #03872d

Contrast

#031b86 as textRatioAAAA largeAAAFix
Aaon white
13.95:1passpasspassPasses AAA — no fix needed.
Aaon black
1.5:1failfailfail
  • AA: use #4667fb as the text (4.59:1)
  • AAA: use #7890fc as the text (7.19:1)
  • AA: or shift the background to #949494 (4.6:1)
  • AAA: or shift the background to #b8b8b8 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #031b86 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

#031b86 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #031b86
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 #031b86 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/031b86-9c9fc4-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