Color

#173997

#173997
hex#173997
rgbrgb(23, 57, 151)
hslhsl(224, 74%, 34%)
oklchoklch(0.386 0.159 264.6)
Closest name: Depths of Night (#2c319b)Relative luminance 0.0534

Colors that go with #173997

Charcoal, Steel Blue and Blue 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 →

#977517

#177997 · #341797

#971739 · #399717

Split-complementary

Open in tool →

#973417 · #799717

#971779 · #977517 · #179734

Contrast

#173997 as textRatioAAAA largeAAAFix
Aaon white
10.15:1passpasspassPasses AAA — no fix needed.
Aaon black
2.07:1failfailfail
  • AA: use #456fe3 as the text (4.64:1)
  • AAA: use #7595ea as the text (7.24:1)
  • AA: or shift the background to #adadad (4.52:1)
  • AAA: or shift the background to #d9d9d9 (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 #173997 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#173997 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #173997
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 #173997 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/173997-9ca2c4-df724e-221f2d-e9eff1?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