Color

#173f96

#173f96
hex#173f96
rgbrgb(23, 63, 150)
hslhsl(221, 73%, 34%)
oklchoklch(0.398 0.15 262.9)
Closest name: Cascade Twilight (#234893)Relative luminance 0.0594

Colors that go with #173f96

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 →

#966e17

#177f96 · #2f1796

#96173f · #3f9617

Split-complementary

Open in tool →

#962f17 · #7f9617

#96177f · #966e17 · #17962f

Contrast

#173f96 as textRatioAAAA largeAAAFix
Aaon white
9.6:1passpasspassPasses AAA — no fix needed.
Aaon black
2.19:1failfailfail
  • AA: use #3d71e1 as the text (4.65:1)
  • AAA: use #6d94e8 as the text (7.05:1)
  • AA: or shift the background to #b3b3b3 (4.58:1)
  • AAA: or shift the background to #dedede (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #173f96 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#173f96 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #173f96
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 #173f96 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/173f96-9ca4c4-df6b4e-211f2d-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