Color

#284fa9

#284fa9
hex#284fa9
rgbrgb(40, 79, 169)
hslhsl(222, 62%, 41%)
oklchoklch(0.453 0.152 263.8)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.0891

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a98228

#288fa9 · #4228a9

#a9284f · #4fa928

Split-complementary

Open in tool →

#a94228 · #8fa928

#a9288f · #a98228 · #28a942

Contrast

#284fa9 as textRatioAAAA largeAAAFix
Aaon white
7.55:1passpasspassPasses AAA — no fix needed.
Aaon black
2.78:1failfailfail
  • AA: use #4570d3 as the text (4.51:1)
  • AAA: use #7796df as the text (7.21:1)
  • AA: or shift the background to #c9c9c9 (4.56:1)
  • AAA: or shift the background to #f7f7f7 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #284fa9 as the background.

Brands using this color

Fonts for this mood

#284fa9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #284fa9
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 #284fa9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/284fa9-9ca3c4-df6e4e-211f2d-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