Color

#333dfa

#333dfa
hex#333dfa
rgbrgb(51, 61, 250)
hslhsl(237, 95%, 59%)
oklchoklch(0.504 0.27 269.5)
Closest name: C64 Blue (#003aff)Relative luminance 0.1094

Tints & shades

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

Harmonies

Complementary

Open in tool →

#faf033

#33a0fa · #8d33fa

#fa333d · #3dfa33

Split-complementary

Open in tool →

#fa8d33 · #a0fa33

#fa33a0 · #faf033 · #33fa8d

Contrast

#333dfa as textRatioAAAA largeAAAFix
Aaon white
6.59:1passpassfail
  • AAA: use #2934fa as the text (7.08:1)
Aaon black
3.19:1failpassfail
  • AA: use #5b63fb as the text (4.62:1)
  • AAA: use #888dfc as the text (7.26:1)
  • AA: or shift the background to #d6d6d6 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #333dfa 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

#333dfa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #333dfa
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 #333dfa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/333dfa-9f9cc4-df924e-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