Color

#283243

#283243
hex#283243
rgbrgb(40, 50, 67)
hslhsl(218, 25%, 21%)
oklchoklch(0.316 0.034 260.9)
Closest name: Blue Whale (#1e3442)Relative luminance 0.0314

Tints & shades

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

Harmonies

Complementary

Open in tool →

#433928

#283f43 · #2c2843

#432832 · #324328

Split-complementary

Open in tool →

#432c28 · #3f4328

#43283f · #433928 · #28432c

Contrast

#283243 as textRatioAAAA largeAAAFix
Aaon white
12.9:1passpasspassPasses AAA — no fix needed.
Aaon black
1.63:1failfailfail
  • AA: use #5e759c as the text (4.5:1)
  • AAA: use #8698b6 as the text (7.18:1)
  • AA: or shift the background to #999999 (4.53:1)
  • AAA: or shift the background to #bfbfbf (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 #283243 as the background.

Brands using this color

Fonts for this mood

#283243 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283243
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 #283243 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283243-9ca6c4-df644e-201f2d-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