Color

#15434c

#15434c
hex#15434c
rgbrgb(21, 67, 76)
hslhsl(190, 57%, 19%)
oklchoklch(0.356 0.051 213)
Closest name: Cold and Dark (#154250)Relative luminance 0.047

Colors that go with #15434c

Steel Blue, Teal and Rust 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 →

#4c1e15

#154c3a · #15274c

#4c1543 · #434c15

Split-complementary

Open in tool →

#4c1527 · #4c3a15

#3a154c · #4c1e15 · #274c15

Contrast

#15434c as textRatioAAAA largeAAAFix
Aaon white
10.83:1passpasspassPasses AAA — no fix needed.
Aaon black
1.94:1failfailfail
  • AA: use #277f90 as the text (4.52:1)
  • AAA: use #34a5bc as the text (7.25:1)
  • AA: or shift the background to #a8a8a8 (4.55:1)
  • AAA: or shift the background to #d1d1d1 (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 #15434c as the background.

Brands using this color

Fonts for this mood

#15434c reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #15434c
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 #15434c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15434c-a2b6be-df4e7c-1f252d-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