Color

#333aff

#333aff
hex#333aff
rgbrgb(51, 58, 255)
hslhsl(238, 100%, 60%)
oklchoklch(0.505 0.278 269.5)
Closest name: C64 Blue (#003aff)Relative luminance 0.1095

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fff833

#33a0ff · #9233ff

#ff333a · #3aff33

Split-complementary

Open in tool →

#ff9233 · #a0ff33

#ff33a0 · #fff833 · #33ff92

Contrast

#333aff as textRatioAAAA largeAAAFix
Aaon white
6.58:1passpassfail
  • AAA: use #2930ff as the text (7.09:1)
Aaon black
3.19:1failpassfail
  • AA: use #5c61ff as the text (4.61:1)
  • AAA: use #8589ff as the text (7.02:1)
  • 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 #333aff 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

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

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

tool url/palettes/new/333aff-9f9cc4-df944e-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