Color

#283c43

#283c43
hex#283c43
rgbrgb(40, 60, 67)
hslhsl(196, 25%, 21%)
oklchoklch(0.342 0.028 221.7)
Closest name: Sunken Harbour (#1c3d44)Relative luminance 0.0409

Colors that go with #283c43

Amber, Blue and Blush Pink lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#432f28

#28433d · #282e43

#43283c · #3c4328

Split-complementary

Open in tool →

#43282e · #433d28

#3d2843 · #432f28 · #2e4328

Contrast

#283c43 as textRatioAAAA largeAAAFix
Aaon white
11.55:1passpasspassPasses AAA — no fix needed.
Aaon black
1.82:1failfailfail
  • AA: use #527a89 as the text (4.5:1)
  • AAA: use #739cab as the text (7.07:1)
  • AA: or shift the background to #a3a3a3 (4.58:1)
  • AAA: or shift the background to #cccccc (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #283c43 as the background.

Brands using this color

Fonts for this mood

#283c43 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283c43
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #283c43 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283c43-9cb5c4-df4e6e-1f232d-e9f1ef?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