Color

#3333fa

#3333fa
hex#3333fa
rgbrgb(51, 51, 250)
hslhsl(240, 95%, 59%)
oklchoklch(0.492 0.278 270)
Closest name: C64 Blue (#003aff)Relative luminance 0.0997

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fafa33

#3396fa · #9633fa

#fa3333 · #33fa33

Split-complementary

Open in tool →

#fa9633 · #96fa33

#fa3396 · #fafa33 · #33fa96

Contrast

#3333fa as textRatioAAAA largeAAAFix
Aaon white
7.01:1passpasspassPasses AAA — no fix needed.
Aaon black
2.99:1failfailfail
  • AA: use #6060fb as the text (4.56:1)
  • AAA: use #8d8dfc as the text (7.35:1)
  • AA: or shift the background to #cfcfcf (4.5:1)
  • AAA: or shift the background to #ffffff (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3333fa 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

#3333fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3333fa
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 #3333fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3333fa-a19cc4-df994e-251f2d-e9edf1?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