Color

#2839cc

#2839cc
hex#2839cc
rgbrgb(40, 57, 204)
hslhsl(234, 67%, 48%)
oklchoklch(0.445 0.223 268.8)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0774

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ccbc28

#288bcc · #6a28cc

#cc2839 · #39cc28

Split-complementary

Open in tool →

#cc6a28 · #8bcc28

#cc288b · #ccbc28 · #28cc6a

Contrast

#2839cc as textRatioAAAA largeAAAFix
Aaon white
8.24:1passpasspassPasses AAA — no fix needed.
Aaon black
2.55:1failfailfail
  • AA: use #5d6adf as the text (4.59:1)
  • AAA: use #8891e7 as the text (7.25:1)
  • AA: or shift the background to #c2c2c2 (4.63:1)
  • AAA: or shift the background to #ededed (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2839cc 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

#2839cc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2839cc
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 #2839cc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2839cc-9d9cc4-df8a4e-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