Color

#031db5

#031db5
hex#031db5
rgbrgb(3, 29, 181)
hslhsl(231, 97%, 36%)
oklchoklch(0.371 0.228 264.6)
Closest name: Dark Galaxy (#0018a8)Relative luminance 0.0423

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b59a03

#0377b5 · #4103b5

#b5031d · #1db503

Split-complementary

Open in tool →

#b54103 · #77b503

#b50377 · #b59a03 · #03b541

Contrast

#031db5 as textRatioAAAA largeAAAFix
Aaon white
11.37:1passpasspassPasses AAA — no fix needed.
Aaon black
1.85:1failfailfail
  • AA: use #4a65fc as the text (4.56:1)
  • AAA: use #7c90fd as the text (7.26:1)
  • AA: or shift the background to #a3a3a3 (4.51:1)
  • AAA: or shift the background to #cccccc (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #031db5 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

#031db5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #031db5
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 #031db5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/031db5-9c9ec4-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