Color

#283ceb

#283ceb
hex#283ceb
rgbrgb(40, 60, 235)
hslhsl(234, 83%, 54%)
oklchoklch(0.482 0.256 267.9)
Closest name: C64 Blue (#003aff)Relative luminance 0.0968

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ebd828

#289deb · #7628eb

#eb283c · #3ceb28

Split-complementary

Open in tool →

#eb7628 · #9deb28

#eb289d · #ebd828 · #28eb76

Contrast

#283ceb as textRatioAAAA largeAAAFix
Aaon white
7.15:1passpasspassPasses AAA — no fix needed.
Aaon black
2.94:1failfailfail
  • AA: use #5766ef as the text (4.55:1)
  • AAA: use #8691f4 as the text (7.37:1)
  • AA: or shift the background to #cfcfcf (4.59:1)
  • AAA: or shift the background to #ffffff (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #283ceb 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

#283ceb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283ceb
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 #283ceb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283ceb-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