Color

#1f2f42

#1f2f42
hex#1f2f42
rgbrgb(31, 47, 66)
hslhsl(213, 36%, 19%)
oklchoklch(0.3 0.041 253.3)
Closest name: Blue Whale (#1e3442)Relative luminance 0.0272

Colors that go with #1f2f42

Dark Olive Green, Sea Green and Sienna 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 →

#42321f

#1f4042 · #211f42

#421f2f · #2f421f

Split-complementary

Open in tool →

#42211f · #40421f

#421f40 · #42321f · #1f4221

Contrast

#1f2f42 as textRatioAAAA largeAAAFix
Aaon white
13.61:1passpasspassPasses AAA — no fix needed.
Aaon black
1.54:1failfailfail
  • AA: use #5078aa as the text (4.61:1)
  • AAA: use #7898bf as the text (7.04:1)
  • AA: or shift the background to #969696 (4.6:1)
  • AAA: or shift the background to #bababa (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1f2f42 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1f2f42 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1f2f42
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 #1f2f42 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1f2f42-9ca9c4-df584e-1f202d-e9f0f1?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