Color

#0037ff

#0037ff
hex#0037ff
rgbrgb(0, 55, 255)
hslhsl(227, 100%, 50%)
oklchoklch(0.49 0.288 264.1)
Closest name: C64 Blue (#003aff)Relative luminance 0.0995

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ffc800

#00b7ff · #4800ff

#ff0037 · #37ff00

Split-complementary

Open in tool →

#ff4800 · #b7ff00

#ff00b7 · #ffc800 · #00ff48

Contrast

#0037ff as textRatioAAAA largeAAAFix
Aaon white
7.02:1passpasspassPasses AAA — no fix needed.
Aaon black
2.99:1failfailfail
  • AA: use #3d67ff as the text (4.58:1)
  • AAA: use #708fff as the text (7.06:1)
  • AA: or shift the background to #cfcfcf (4.51:1)
  • AAA: or shift the background to #ffffff (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0037ff 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

#0037ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0037ff
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 #0037ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0037ff-9ca0c4-df7a4e-221f2d-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