Color

#173e40

#173e40
hex#173e40
rgbrgb(23, 62, 64)
hslhsl(183, 47%, 17%)
oklchoklch(0.337 0.044 199.9)
Closest name: Sunken Harbour (#1c3d44)Relative luminance 0.04

Colors that go with #173e40

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 →

#401917

#17402d · #172940

#40173e · #3e4017

Split-complementary

Open in tool →

#401729 · #402d17

#2d1740 · #401917 · #294017

Contrast

#173e40 as textRatioAAAA largeAAAFix
Aaon white
11.67:1passpasspassPasses AAA — no fix needed.
Aaon black
1.8:1failfailfail
  • AA: use #318387 as the text (4.73:1)
  • AAA: use #3da3a9 as the text (7.01:1)
  • AA: or shift the background to #a1a1a1 (4.52:1)
  • AAA: or shift the background to #c9c9c9 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #173e40 as the background.

Brands using this color

Fonts for this mood

#173e40 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #173e40
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 #173e40 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/173e40-a2b9be-d4598e-1f262d-e9f1ee?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