Color

#172dab

#172dab
hex#172dab
rgbrgb(23, 45, 171)
hslhsl(231, 76%, 38%)
oklchoklch(0.385 0.199 266.8)
Closest name: Blue Hour (#0034ab)Relative luminance 0.05

Colors that go with #172dab

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 →

#ab9417

#1777ab · #4b17ab

#ab172d · #2dab17

Split-complementary

Open in tool →

#ab4b17 · #77ab17

#ab1777 · #ab9417 · #17ab4b

Contrast

#172dab as textRatioAAAA largeAAAFix
Aaon white
10.5:1passpasspassPasses AAA — no fix needed.
Aaon black
2:1failfailfail
  • AA: use #546be8 as the text (4.65:1)
  • AAA: use #8192ee as the text (7.28:1)
  • AA: or shift the background to #ababab (4.57:1)
  • AAA: or shift the background to #d4d4d4 (7.08:1)

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

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

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

tool url/palettes/new/172dab-9c9ec4-df834e-231f2d-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