Color

#173f3f

#173f3f
hex#173f3f
rgbrgb(23, 63, 63)
hslhsl(180, 47%, 17%)
oklchoklch(0.34 0.045 195.3)
Closest name: Botanical Night (#12403c)Relative luminance 0.041

Colors that go with #173f3f

Crimson, Sea Green 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 →

#401717

#17402b · #172b40

#401740 · #404017

Split-complementary

Open in tool →

#40172b · #402b17

#2b1740 · #401717 · #2b4017

Contrast

#173f3f as textRatioAAAA largeAAAFix
Aaon white
11.54:1passpasspassPasses AAA — no fix needed.
Aaon black
1.82:1failfailfail
  • AA: use #2f8383 as the text (4.7:1)
  • AAA: use #3ba5a5 as the text (7.11:1)
  • AA: or shift the background to #a3a3a3 (4.58:1)
  • AAA: or shift the background to #cccccc (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #173f3f as the background.

Brands using this color

Fonts for this mood

#173f3f reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #173f3f
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 #173f3f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/173f3f-a2bbbe-d45994-1f272d-e9f1ed?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