Color

#283f6c

#283f6c
hex#283f6c
rgbrgb(40, 63, 108)
hslhsl(220, 46%, 29%)
oklchoklch(0.373 0.083 262.6)
Closest name: Aegean Blue (#1b416f)Relative luminance 0.0509

Tints & shades

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

Harmonies

Complementary

Open in tool →

#6c5528

#28616c · #33286c

#6c283f · #3f6c28

Split-complementary

Open in tool →

#6c3328 · #616c28

#6c2861 · #6c5528 · #286c33

Contrast

#283f6c as textRatioAAAA largeAAAFix
Aaon white
10.41:1passpasspassPasses AAA — no fix needed.
Aaon black
2.02:1failfailfail
  • AA: use #5075be as the text (4.63:1)
  • AAA: use #7d98cf as the text (7.26:1)
  • AA: or shift the background to #ababab (4.53:1)
  • AAA: or shift the background to #d4d4d4 (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 #283f6c 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

#283f6c reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283f6c
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 #283f6c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283f6c-9ca5c4-df694e-211f2d-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