Color

#171d2b

#171d2b
hex#171d2b
rgbrgb(23, 29, 43)
hslhsl(222, 30%, 13%)
oklchoklch(0.232 0.029 266.3)
Closest name: Dark Knight (#151931)Relative luminance 0.0124

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2b2517

#17272b · #1b172b

#2b171d · #1d2b17

Split-complementary

Open in tool →

#2b1b17 · #272b17

#2b1727 · #2b2517 · #172b1b

Contrast

#171d2b as textRatioAAAA largeAAAFix
Aaon white
16.84:1passpasspassPasses AAA — no fix needed.
Aaon black
1.25:1failfailfail
  • AA: use #6076a9 as the text (4.66:1)
  • AAA: use #8495bd as the text (7.01:1)
  • AA: or shift the background to #858585 (4.56:1)
  • AAA: or shift the background to #a8a8a8 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #171d2b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#171d2b reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #171d2b
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 #171d2b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/171d2b-9ca3c4-df6e4e-211f2d-e9eff1?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