Color

#173d4f

#173d4f
hex#173d4f
rgbrgb(23, 61, 79)
hslhsl(199, 55%, 20%)
oklchoklch(0.341 0.053 231.8)
Closest name: Cold and Dark (#154250)Relative luminance 0.0408

Colors that go with #173d4f

Royal 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 →

#4f2917

#174f45 · #17214f

#4f173d · #3d4f17

Split-complementary

Open in tool →

#4f1721 · #4f4517

#45174f · #4f2917 · #214f17

Contrast

#173d4f as textRatioAAAA largeAAAFix
Aaon white
11.56:1passpasspassPasses AAA — no fix needed.
Aaon black
1.82:1failfailfail
  • AA: use #2f7ea2 as the text (4.63:1)
  • AAA: use #459fc9 as the text (7.06:1)
  • AA: or shift the background to #a3a3a3 (4.58:1)
  • AAA: or shift the background to #cccccc (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #173d4f as the background.

Brands using this color

Fonts for this mood

#173d4f reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #173d4f
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 #173d4f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/173d4f-9cb3c4-df4e66-1f232d-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