index.js
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export const RGB = ({ r, g, b }) => {
return `rgb(${r}, ${g}, ${b})`;
};
// 将rgb颜色转成hex
export const RGBToHex = (color = '') => {
const rgb = color.split(',');
const r = parseInt(rgb[0].split('(')[1]);
const g = parseInt(rgb[1]);
const b = parseInt(rgb[2].split(')')[0]);
const hex = '#' + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
return hex;
};
// 将hex颜色转成rgb
export const HexToRGBA = (hex = '', opacity) => {
const red = parseInt(`0x${hex.slice(1, 3)}`);
const green = parseInt(`0x${hex.slice(3, 5)}`);
const blue = parseInt(`0x${hex.slice(5, 7)}`);
const RGBA = `rgba(${red},${green},${blue},${opacity})`;
return { red, green, blue, rgba: RGBA };
};
const RGB_MAX = 255;
const HUE_MAX = 360;
const SV_MAX = 100;
export const HexToHSL = hex => {
const { red, green, blue } = HexToRGBA(hex);
return RGBToHSL(red, green, blue);
};
export const HSLToRGB = function (h, s, l) {
function _hue2Rgb(p, q, t) {
if (t < 0) t += 1;
if (t > 1) t -= 1;
if (t < 1 / 6) return p + (q - p) * 6 * t;
if (t < 1 / 2) return q;
if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
return p;
}
function _normalizeAngle(degrees) {
return ((degrees % 360) + 360) % 360;
}
if (typeof h === 'object') {
const args = h;
h = args.h;
s = args.s;
l = args.l;
}
var r, g, b;
h = _normalizeAngle(h);
h = h === HUE_MAX ? 1 : (h % HUE_MAX) / parseFloat(HUE_MAX);
s = s === SV_MAX ? 1 : (s % SV_MAX) / parseFloat(SV_MAX);
l = l === SV_MAX ? 1 : (l % SV_MAX) / parseFloat(SV_MAX);
if (s === 0) {
r = g = b = l; // achromatic
} else {
var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
var p = 2 * l - q;
r = _hue2Rgb(p, q, h + 1 / 3);
g = _hue2Rgb(p, q, h);
b = _hue2Rgb(p, q, h - 1 / 3);
}
return {
r: Math.round(r * RGB_MAX),
g: Math.round(g * RGB_MAX),
b: Math.round(b * RGB_MAX),
};
};
export const RGBToHSL = (r, g, b) => {
if (typeof r === 'object') {
const args = r;
r = args.r;
g = args.g;
b = args.b;
}
// It converts [0,255] format, to [0,1]
r = r === RGB_MAX ? 1 : (r % RGB_MAX) / parseFloat(RGB_MAX);
g = g === RGB_MAX ? 1 : (g % RGB_MAX) / parseFloat(RGB_MAX);
b = b === RGB_MAX ? 1 : (b % RGB_MAX) / parseFloat(RGB_MAX);
var max = Math.max(r, g, b);
var min = Math.min(r, g, b);
var h,
s,
l = (max + min) / 2;
if (max === min) {
h = s = 0; // achromatic
} else {
var d = max - min;
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
switch (max) {
case r:
h = (g - b) / d + (g < b ? 6 : 0);
break;
case g:
h = (b - r) / d + 2;
break;
case b:
h = (r - g) / d + 4;
break;
}
h /= 6;
}
return {
h: Math.round(h * HUE_MAX),
s: Math.round(s * SV_MAX),
l: Math.round(l * SV_MAX),
};
};