Color

#15131b

#15131b
hex#15131b
rgbrgb(21, 19, 27)
hslhsl(255, 17%, 9%)
oklchoklch(0.193 0.016 296.3)
Closest name: Back in Black (#16141c)Relative luminance 0.007

Tints & shades

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

Harmonies

Complementary

Open in tool →

#191b13

#13151b · #19131b

#1b1513 · #131b15

Split-complementary

Open in tool →

#1b1913 · #151b13

#1b1315 · #191b13 · #131b19

Contrast

#15131b as textRatioAAAA largeAAAFix
Aaon white
18.41:1passpasspassPasses AAA — no fix needed.
Aaon black
1.14:1failfailfail
  • AA: use #7a7099 as the text (4.61:1)
  • AAA: use #9991b1 as the text (7.04:1)
  • AA: or shift the background to #808080 (4.66:1)
  • AAA: or shift the background to #a1a1a1 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #15131b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#15131b reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #15131b
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 #15131b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15131b-ab9cc4-dfbd4e-291f2d-e9ebf1?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