Color

#171e73

#171e73
hex#171e73
rgbrgb(23, 30, 115)
hslhsl(235, 67%, 27%)
oklchoklch(0.299 0.143 270.6)
Closest name: midnightblue (#191970)Relative luminance 0.0235

Tints & shades

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

Harmonies

Complementary

Open in tool →

#736b17

#174d73 · #3d1773

#73171e · #1e7317

Split-complementary

Open in tool →

#733d17 · #4d7317

#73174d · #736b17 · #17733d

Contrast

#171e73 as textRatioAAAA largeAAAFix
Aaon white
14.29:1passpasspassPasses AAA — no fix needed.
Aaon black
1.47:1failfailfail
  • AA: use #5d68df as the text (4.51:1)
  • AAA: use #8890e7 as the text (7.19:1)
  • AA: or shift the background to #919191 (4.53:1)
  • AAA: or shift the background to #b8b8b8 (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #171e73 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

#171e73 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #171e73
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 #171e73 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/171e73-9e9cc4-df8d4e-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