Color

#283b3e

#283b3e
hex#283b3e
rgbrgb(40, 59, 62)
hslhsl(188, 22%, 20%)
oklchoklch(0.337 0.025 208.2)
Closest name: Royal Neptune (#1c3b42)Relative luminance 0.0393

Colors that go with #283b3e

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 →

#3e2b28

#283e36 · #28303e

#3e283b · #3b3e28

Split-complementary

Open in tool →

#3e2830 · #3e3628

#36283e · #3e2b28 · #303e28

Contrast

#283b3e as textRatioAAAA largeAAAFix
Aaon white
11.76:1passpasspassPasses AAA — no fix needed.
Aaon black
1.79:1failfailfail
  • AA: use #547c83 as the text (4.59:1)
  • AAA: use #709da4 as the text (7.05:1)
  • AA: or shift the background to #a1a1a1 (4.55:1)
  • AAA: or shift the background to #c9c9c9 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #283b3e 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

#283b3e reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283b3e
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 #283b3e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283b3e-a2b7be-df4e81-1f252d-e9f1ee?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