颜色转换器/ HEX · RGB · HSL · HSV · CMYK

/* CSS custom properties */
:root {
  --color-primary: #3b82f6;         /* HEX */
  --color-primary-rgb: 59, 130, 246; /* RGB values only */
}

/* Usage */
.button {
  background: var(--color-primary);
  color: hsl(210, 40%, 98%);        /* HSL */
  border: 1px solid rgb(59 130 246 / 30%); /* CSS 4 syntax */
}

/* Tailwind config */
// tailwind.config.js
colors: { brand: '#3b82f6' }

// HEX → RGB
function hexToRgb(hex) {
  const n = parseInt(hex.replace('#', ''), 16);
  return { r: (n >> 16) & 255, g: (n >> 8) & 255, b: n & 255 };
}

// RGB → HEX
function rgbToHex(r, g, b) {
  return '#' + [r, g, b]
    .map(v => v.toString(16).padStart(2, '0'))
    .join('');
}

// npm: chroma-js (full-featured)
import chroma from 'chroma-js';
chroma('#3b82f6').rgb()   // [59, 130, 246]
chroma('#3b82f6').hsl()   // [0.58, 0.89, 0.60]
chroma.scale(['white','#3b82f6']).colors(6)

import colorsys

# HEX → RGB
hex_str = '#3b82f6'
rgb = tuple(int(hex_str[i:i+2], 16) for i in (1, 3, 5))
# (59, 130, 246)

# RGB → HSL (0-1 range)
r, g, b = (v / 255 for v in rgb)
h, l, s = colorsys.rgb_to_hls(r, g, b)
print(f"hsl({h*360:.0f}, {s*100:.0f}%, {l*100:.0f}%)")

# pip install colour-science
import colour
colour.sRGB_to_XYZ([0.23, 0.51, 0.96])

import SwiftUI

// HEX to Color
extension Color {
  init(hex: String) {
    let hex = hex.trimmingCharacters(
      in: .alphanumerics.inverted)
    var int = UInt64()
    Scanner(string: hex).scanHexInt64(&int)
    let r = Double((int >> 16) & 0xFF) / 255
    let g = Double((int >> 8)  & 0xFF) / 255
    let b = Double( int        & 0xFF) / 255
    self.init(red: r, green: g, blue: b)
  }
}

Color(hex: "#3b82f6")