Color

#1f404c

#1f404c
hex#1f404c
rgbrgb(31, 64, 76)
hslhsl(196, 42%, 21%)
oklchoklch(0.352 0.044 224)
Closest name: Cold and Dark (#154250)Relative luminance 0.0448

Colors that go with #1f404c

Steel Blue, Teal 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 →

#4c2b1f

#1f4c42 · #1f2a4c

#4c1f40 · #404c1f

Split-complementary

Open in tool →

#4c1f2a · #4c421f

#421f4c · #4c2b1f · #2a4c1f

Contrast

#1f404c as textRatioAAAA largeAAAFix
Aaon white
11.08:1passpasspassPasses AAA — no fix needed.
Aaon black
1.9:1failfailfail
  • AA: use #3d7d94 as the text (4.56:1)
  • AAA: use #559fb9 as the text (7.05:1)
  • AA: or shift the background to #a6a6a6 (4.55:1)
  • AAA: or shift the background to #cfcfcf (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1f404c as the background.

Brands using this color

Fonts for this mood

#1f404c reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1f404c
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 #1f404c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1f404c-9cb5c4-df4e6e-1f232d-e9f1ef?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