Color

#283d43

#283d43
hex#283d43
rgbrgb(40, 61, 67)
hslhsl(193, 25%, 21%)
oklchoklch(0.345 0.028 217.5)
Closest name: Sunken Harbour (#1c3d44)Relative luminance 0.0419

Tints & shades

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

Harmonies

Complementary

Open in tool →

#432e28

#28433b · #283043

#43283d · #3d4328

Split-complementary

Open in tool →

#432830 · #433b28

#3b2843 · #432e28 · #304328

Contrast

#283d43 as textRatioAAAA largeAAAFix
Aaon white
11.42:1passpasspassPasses AAA — no fix needed.
Aaon black
1.84:1failfailfail
  • AA: use #527d89 as the text (4.65:1)
  • AAA: use #709da9 as the text (7.08:1)
  • AA: or shift the background to #a3a3a3 (4.53:1)
  • AAA: or shift the background to #cccccc (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #283d43 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

#283d43 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283d43
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 #283d43 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283d43-a2b5be-df4e75-1f242d-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