Color

#0351bf

#0351bf
hex#0351bf
rgbrgb(3, 81, 191)
hslhsl(215, 97%, 38%)
oklchoklch(0.467 0.185 259.8)
Closest name: Denim (#2243b6)Relative luminance 0.0967

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bf7103

#03afbf · #1303bf

#bf0351 · #51bf03

Split-complementary

Open in tool →

#bf1303 · #afbf03

#bf03af · #bf7103 · #03bf13

Contrast

#0351bf as textRatioAAAA largeAAAFix
Aaon white
7.16:1passpasspassPasses AAA — no fix needed.
Aaon black
2.93:1failfailfail
  • AA: use #046bfb as the text (4.5:1)
  • AAA: use #4f97fc as the text (7.16:1)
  • AA: or shift the background to #cfcfcf (4.6:1)
  • AAA: or shift the background to #ffffff (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0351bf 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

#0351bf reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0351bf
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 #0351bf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0351bf-9ca8c4-df5d4e-201f2d-e9f0f1?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