Color

#284bd7

#284bd7
hex#284bd7
rgbrgb(40, 75, 215)
hslhsl(228, 69%, 50%)
oklchoklch(0.485 0.217 266.6)
Closest name: Blurple (#5539cc)Relative luminance 0.1039

Colors that go with #284bd7

Charcoal, Sea Green and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Real palettes that use #284bd7

Tints & shades

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

Harmonies

Complementary

Open in tool →

#d7b428

#28a3d7 · #5c28d7

#d7284b · #4bd728

Split-complementary

Open in tool →

#d75c28 · #a3d728

#d728a3 · #d7b428 · #28d75c

Contrast

#284bd7 as textRatioAAAA largeAAAFix
Aaon white
6.82:1passpassfail
  • AAA: use #2749d3 as the text (7.05:1)
Aaon black
3.08:1failpassfail
  • AA: use #536fdf as the text (4.71:1)
  • AAA: use #7e93e7 as the text (7.21:1)
  • AA: or shift the background to #d4d4d4 (4.6:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #284bd7 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#284bd7 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #284bd7
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #284bd7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/284bd7-9c9fc4-df7c4e-231f2d-e9eff1?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