Color

#3308dd

#3308dd
hex#3308dd
rgbrgb(51, 8, 221)
hslhsl(252, 93%, 45%)
oklchoklch(0.426 0.269 272.8)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.061

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b3dd08

#0848dd · #9d08dd

#dd3308 · #08dd33

Split-complementary

Open in tool →

#dd9d08 · #48dd08

#dd0848 · #b3dd08 · #08dd9d

Contrast

#3308dd as textRatioAAAA largeAAAFix
Aaon white
9.46:1passpasspassPasses AAA — no fix needed.
Aaon black
2.22:1failfailfail
  • AA: use #7858f9 as the text (4.56:1)
  • AAA: use #9c84fb as the text (7.11:1)
  • AA: or shift the background to #b3b3b3 (4.51:1)
  • AAA: or shift the background to #dedede (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3308dd 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

#3308dd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3308dd
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 #3308dd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3308dd-a99cc4-dfb64e-281f2d-e9ecf1?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