Color

#0033ff

#0033ff
hex#0033ff
rgbrgb(0, 51, 255)
hslhsl(228, 100%, 50%)
oklchoklch(0.485 0.291 264.1)
Closest name: C64 Blue (#003aff)Relative luminance 0.0959

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ffcc00

#00b3ff · #4c00ff

#ff0033 · #33ff00

Split-complementary

Open in tool →

#ff4d00 · #b3ff00

#ff00b3 · #ffcc00 · #00ff4c

Contrast

#0033ff as textRatioAAAA largeAAAFix
Aaon white
7.2:1passpasspassPasses AAA — no fix needed.
Aaon black
2.92:1failfailfail
  • AA: use #4268ff as the text (4.66:1)
  • AAA: use #7591ff as the text (7.25:1)
  • AA: or shift the background to #cfcfcf (4.62:1)
  • AAA: or shift the background to #fcfcfc (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 #0033ff 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

#0033ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0033ff
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 #0033ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0033ff-9c9fc4-df7c4e-231f2d-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