Color

#1b414b

#1b414b
hex#1b414b
rgbrgb(27, 65, 75)
hslhsl(193, 47%, 20%)
oklchoklch(0.352 0.046 217.5)
Closest name: Cold and Dark (#154250)Relative luminance 0.0452

Colors that go with #1b414b

Crimson, Steel Blue and Teal 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 →

#4b251b

#1b4b3d · #1b294b

#4b1b41 · #414b1b

Split-complementary

Open in tool →

#4b1b29 · #4b3d1b

#3d1b4b · #4b251b · #294b1b

Contrast

#1b414b as textRatioAAAA largeAAAFix
Aaon white
11.03:1passpasspassPasses AAA — no fix needed.
Aaon black
1.9:1failfailfail
  • AA: use #357e92 as the text (4.55:1)
  • AAA: use #44a1bb as the text (7.06:1)
  • AA: or shift the background to #a6a6a6 (4.53:1)
  • AAA: or shift the background to #cfcfcf (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 #1b414b as the background.

Brands using this color

Fonts for this mood

#1b414b reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b414b
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 #1b414b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b414b-a2b5be-df4e75-1f242d-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