Color

#283c8a

#283c8a
hex#283c8a
rgbrgb(40, 60, 138)
hslhsl(228, 55%, 35%)
oklchoklch(0.388 0.132 268.6)
Closest name: Deep Space Royal (#223382)Relative luminance 0.0552

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8a7728

#286d8a · #46288a

#8a283c · #3c8a28

Split-complementary

Open in tool →

#8a4628 · #6d8a28

#8a286d · #8a7728 · #288a46

Contrast

#283c8a as textRatioAAAA largeAAAFix
Aaon white
9.98:1passpasspassPasses AAA — no fix needed.
Aaon black
2.1:1failfailfail
  • AA: use #5971cf as the text (4.69:1)
  • AAA: use #8192da as the text (7.06:1)
  • AA: or shift the background to #b0b0b0 (4.6:1)
  • AAA: or shift the background to #d9d9d9 (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 #283c8a 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

#283c8a reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283c8a
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 #283c8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283c8a-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