Color

#172ab5

#172ab5
hex#172ab5
rgbrgb(23, 42, 181)
hslhsl(233, 77%, 40%)
oklchoklch(0.392 0.214 266.9)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0517

Colors that go with #172ab5

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 →

#b5a217

#1778b5 · #5417b5

#b5172a · #2ab517

Split-complementary

Open in tool →

#b55417 · #78b517

#b51778 · #b5a217 · #17b554

Contrast

#172ab5 as textRatioAAAA largeAAAFix
Aaon white
10.32:1passpasspassPasses AAA — no fix needed.
Aaon black
2.03:1failfailfail
  • AA: use #5869e9 as the text (4.61:1)
  • AAA: use #8592ef as the text (7.36:1)
  • AA: or shift the background to #adadad (4.6:1)
  • AAA: or shift the background to #d6d6d6 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #172ab5 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

#172ab5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #172ab5
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 #172ab5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/172ab5-9c9cc4-df884e-241f2d-e9eef1?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