Color

#031fbf

#031fbf
hex#031fbf
rgbrgb(3, 31, 191)
hslhsl(231, 97%, 38%)
oklchoklch(0.386 0.237 264.5)
Closest name: mediumblue (#0000cd)Relative luminance 0.0476

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bfa303

#037dbf · #4503bf

#bf031f · #1fbf03

Split-complementary

Open in tool →

#bf4503 · #7dbf03

#bf037d · #bfa303 · #03bf45

Contrast

#031fbf as textRatioAAAA largeAAAFix
Aaon white
10.76:1passpasspassPasses AAA — no fix needed.
Aaon black
1.95:1failfailfail
  • AA: use #4a65fc as the text (4.56:1)
  • AAA: use #7c90fd as the text (7.26:1)
  • AA: or shift the background to #a8a8a8 (4.52:1)
  • AAA: or shift the background to #d1d1d1 (7.04:1)

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

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

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

tool url/palettes/new/031fbf-9c9ec4-df834e-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