Color

#171c72

#171c72
hex#171c72
rgbrgb(23, 28, 114)
hslhsl(237, 66%, 27%)
oklchoklch(0.294 0.144 271.1)
Closest name: midnightblue (#191970)Relative luminance 0.0223

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#726e17

#174972 · #401772

#72171c · #1c7217

Split-complementary

Open in tool →

#724017 · #497217

#721749 · #726e17 · #177240

Contrast

#171c72 as textRatioAAAA largeAAAFix
Aaon white
14.53:1passpasspassPasses AAA — no fix needed.
Aaon black
1.45:1failfailfail
  • AA: use #6269df as the text (4.61:1)
  • AAA: use #888de7 as the text (7.01:1)
  • AA: or shift the background to #919191 (4.61:1)
  • AAA: or shift the background to #b5b5b5 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #171c72 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

#171c72 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #171c72
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #171c72 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/171c72-9f9cc4-df924e-251f2d-e9edf1?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