Color

#1b2323

#1b2323
hex#1b2323
rgbrgb(27, 35, 35)
hslhsl(180, 13%, 12%)
oklchoklch(0.248 0.011 196.4)
Closest name: Underworld (#1e231c)Relative luminance 0.0156

Tints & shades

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

Harmonies

Complementary

Open in tool →

#231b1b

#1b231f · #1b1f23

#231b23 · #23231b

Split-complementary

Open in tool →

#231b1f · #231f1b

#1f1b23 · #231b1b · #1f231b

Contrast

#1b2323 as textRatioAAAA largeAAAFix
Aaon white
16.01:1passpasspassPasses AAA — no fix needed.
Aaon black
1.31:1failfailfail
  • AA: use #5f7c7c as the text (4.66:1)
  • AAA: use #7d9b9b as the text (7.03:1)
  • AA: or shift the background to #8a8a8a (4.64:1)
  • AAA: or shift the background to #adadad (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b2323 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1b2323 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b2323
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 #1b2323 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b2323-a2bbbe-d45994-1f272d-e9f1ed?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