Color

#173ccf

#173ccf
hex#173ccf
rgbrgb(23, 60, 207)
hslhsl(228, 80%, 45%)
oklchoklch(0.447 0.227 265.4)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0792

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cfaa17

#1797cf · #4e17cf

#cf173c · #3ccf17

Split-complementary

Open in tool →

#cf4e17 · #97cf17

#cf1797 · #cfaa17 · #17cf4e

Contrast

#173ccf as textRatioAAAA largeAAAFix
Aaon white
8.13:1passpasspassPasses AAA — no fix needed.
Aaon black
2.58:1failfailfail
  • AA: use #4c6ceb as the text (4.65:1)
  • AAA: use #7a92f0 as the text (7.2:1)
  • AA: or shift the background to #c2c2c2 (4.56:1)
  • AAA: or shift the background to #f0f0f0 (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 #173ccf as the background.

Brands using this color

Fonts for this mood

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

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

tool url/palettes/new/173ccf-9c9fc4-df7c4e-231f2d-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