Color

#3933db

#3933db
hex#3933db
rgbrgb(57, 51, 219)
hslhsl(242, 70%, 53%)
oklchoklch(0.461 0.242 273.1)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0835

Tints & shades

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

Harmonies

Complementary

Open in tool →

#d5db33

#3382db · #8d33db

#db3933 · #33db39

Split-complementary

Open in tool →

#db8d33 · #82db33

#db3382 · #d5db33 · #33db8d

Contrast

#3933db as textRatioAAAA largeAAAFix
Aaon white
7.86:1passpasspassPasses AAA — no fix needed.
Aaon black
2.67:1failfailfail
  • AA: use #6b67e4 as the text (4.69:1)
  • AAA: use #918eeb as the text (7.27:1)
  • AA: or shift the background to #c4c4c4 (4.51:1)
  • AAA: or shift the background to #f2f2f2 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3933db 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

#3933db reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3933db
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 #3933db and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3933db-a29cc4-df9e4e-261f2d-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