Color

#333feb

#333feb
hex#333feb
rgbrgb(51, 63, 235)
hslhsl(236, 82%, 56%)
oklchoklch(0.491 0.251 269.9)
Closest name: C64 Blue (#003aff)Relative luminance 0.1026

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ebdf33

#339beb · #8333eb

#eb333f · #3feb33

Split-complementary

Open in tool →

#eb8333 · #9beb33

#eb339b · #ebdf33 · #33eb83

Contrast

#333feb as textRatioAAAA largeAAAFix
Aaon white
6.88:1passpassfail
  • AAA: use #2e3bea as the text (7.17:1)
Aaon black
3.05:1failpassfail
  • AA: use #5d66ef as the text (4.61:1)
  • AAA: use #868ef3 as the text (7.18:1)
  • AA: or shift the background to #d1d1d1 (4.51:1)

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

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

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

tool url/palettes/new/333feb-9e9cc4-df8f4e-241f2d-e9eef1?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