Color

#284fa4

#284fa4
hex#284fa4
rgbrgb(40, 79, 164)
hslhsl(221, 61%, 40%)
oklchoklch(0.449 0.145 263.2)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.0872

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a47d28

#288da4 · #3f28a4

#a4284f · #4fa428

Split-complementary

Open in tool →

#a43f28 · #8da428

#a4288d · #a47d28 · #28a43f

Contrast

#284fa4 as textRatioAAAA largeAAAFix
Aaon white
7.65:1passpasspassPasses AAA — no fix needed.
Aaon black
2.74:1failfailfail
  • AA: use #4673d2 as the text (4.64:1)
  • AAA: use #7395dd as the text (7.07:1)
  • AA: or shift the background to #c7c7c7 (4.53:1)
  • AAA: or shift the background to #f5f5f5 (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 #284fa4 as the background.

Brands using this color

Fonts for this mood

#284fa4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #284fa4
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 #284fa4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/284fa4-9ca4c4-df6b4e-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