Color

#1f2f37

#1f2f37
hex#1f2f37
rgbrgb(31, 47, 55)
hslhsl(200, 28%, 17%)
oklchoklch(0.295 0.026 230.4)
Closest name: Nightmare Fuel (#293135)Relative luminance 0.026

Colors that go with #1f2f37

Amber, Blue and Blue Violet lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#37271f

#1f3733 · #1f2337

#371f2f · #2f371f

Split-complementary

Open in tool →

#371f23 · #37331f

#331f37 · #37271f · #23371f

Contrast

#1f2f37 as textRatioAAAA largeAAAFix
Aaon white
13.82:1passpasspassPasses AAA — no fix needed.
Aaon black
1.52:1failfailfail
  • AA: use #517b90 as the text (4.59:1)
  • AAA: use #739cb0 as the text (7.11:1)
  • AA: or shift the background to #949494 (4.55:1)
  • AAA: or shift the background to #bababa (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 #1f2f37 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1f2f37 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1f2f37
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #1f2f37 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1f2f37-9cb2c4-df4e64-1f232d-e9f1f0?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