Color

#173e59

#173e59
hex#173e59
rgbrgb(23, 62, 89)
hslhsl(205, 59%, 22%)
oklchoklch(0.35 0.064 242.1)
Closest name: Capital Blue (#1a4157)Relative luminance 0.0435

Colors that go with #173e59

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 →

#593317

#175954 · #171d59

#59173e · #3e5917

Split-complementary

Open in tool →

#59171d · #595417

#541759 · #593317 · #1d5917

Contrast

#173e59 as textRatioAAAA largeAAAFix
Aaon white
11.23:1passpasspassPasses AAA — no fix needed.
Aaon black
1.87:1failfailfail
  • AA: use #2e7bb2 as the text (4.59:1)
  • AAA: use #519cd2 as the text (7.04:1)
  • AA: or shift the background to #a6a6a6 (4.61:1)
  • AAA: or shift the background to #cfcfcf (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #173e59 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#173e59 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #173e59
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 #173e59 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/173e59-9cafc4-df4e58-1f212d-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