Color

#284c8a

#284c8a
hex#284c8a
rgbrgb(40, 76, 138)
hslhsl(218, 55%, 35%)
oklchoklch(0.424 0.111 260.5)
Closest name: Assassin (#2d4f83)Relative luminance 0.0745

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8a6628

#287d8a · #35288a

#8a284c · #4c8a28

Split-complementary

Open in tool →

#8a3528 · #7d8a28

#8a287d · #8a6628 · #288a35

Contrast

#284c8a as textRatioAAAA largeAAAFix
Aaon white
8.43:1passpasspassPasses AAA — no fix needed.
Aaon black
2.49:1failfailfail
  • AA: use #4173c8 as the text (4.51:1)
  • AAA: use #7196d6 as the text (7.04:1)
  • AA: or shift the background to #bfbfbf (4.58:1)
  • AAA: or shift the background to #ebebeb (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #284c8a 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

#284c8a reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #284c8a
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 #284c8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/284c8a-9ca6c4-df644e-201f2d-e9f0f1?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