Color

#281e33

#281e33
hex#281e33
rgbrgb(40, 30, 51)
hslhsl(269, 26%, 16%)
oklchoklch(0.257 0.041 305.6)
Closest name: Black Velvet (#222233)Relative luminance 0.0162

Tints & shades

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

Harmonies

Complementary

Open in tool →

#29331e

#1e1f33 · #331e33

#33281e · #1e3328

Split-complementary

Open in tool →

#33331e · #1f331e

#331e1f · #29331e · #1e3333

Contrast

#281e33 as textRatioAAAA largeAAAFix
Aaon white
15.86:1passpasspassPasses AAA — no fix needed.
Aaon black
1.32:1failfailfail
  • AA: use #8668a6 as the text (4.54:1)
  • AAA: use #a58fbd as the text (7.26:1)
  • AA: or shift the background to #8a8a8a (4.6:1)
  • AAA: or shift the background to #adadad (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #281e33 as the background.

Brands using this color

Fonts for this mood

#281e33 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #281e33
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 #281e33 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/281e33-b49cc4-cbcb62-2c1f2d-e9e9f1?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