CLI

The cvt CLI is included in the package. Install globally or use via npx:

bash

npm install -g color-value-tools

Accepts any valid color format: hex, rgb(), hsl(), oklch(), named colors.

bash

# Full info (default command)
cvt "#3498db"

# All format conversions — hex, rgb, hsl, hsv, hwb, lab, lch, oklab, oklch, cmyk
cvt "#3498db" convert

# Contrast ratio and WCAG level
cvt "#3498db" contrast "#ffffff"

# Generate 7 shades
cvt "#3498db" shades 7

# All harmonies — complement, triadic, analogous, split-comp, tetradic
cvt "#3498db" harmonies

# Nearest CSS named color
cvt "cornflowerblue" nearest

cvt "#3498db" (the default info command) prints:

cvt "#3498db"
────────────────────────────────────────
  Type:              hex
  Hex:               #3498db
  RGB:               rgb(52, 152, 219)
  HSL:               hsl(204, 70%, 53%)
  HSV:               hsv(204, 76%, 86%)
  Nearest named:     dodgerblue
  Best text on it:   #000000

CLI ​

CLI