Color

#2f333d

#2f333d
hex#2f333d
rgbrgb(47, 51, 61)
hslhsl(223, 13%, 21%)
oklchoklch(0.321 0.019 268.1)
Closest name: Nightmare Fuel (#293135)Relative luminance 0.0331

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3d392f

#2f393d · #322f3d

#3d2f33 · #333d2f

Split-complementary

Open in tool →

#3d322f · #393d2f

#3d2f39 · #3d392f · #2f3d32

Contrast

#2f333d as textRatioAAAA largeAAAFix
Aaon white
12.64:1passpasspassPasses AAA — no fix needed.
Aaon black
1.66:1failfailfail
  • AA: use #6d768d as the text (4.63:1)
  • AAA: use #8f96a8 as the text (7.1:1)
  • AA: or shift the background to #9c9c9c (4.6:1)
  • AAA: or shift the background to #c2c2c2 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2f333d as the background.

Brands using this color

Fonts for this mood

#2f333d reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2f333d
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 #2f333d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2f333d-9ca3c4-df704e-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