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function componentToHex(c) { | ||
var hex = c.toString(16); | ||
return hex.length == 1 ? "0" + hex : hex; | ||
function componentToHex(c) { | ||
var hex = Math.floor(c).toString(16) | ||
return hex.length == 1 ? "0" + hex : hex | ||
} | ||
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/** | ||
* https://axonflux.com/handy-rgb-to-hsl-and-rgb-to-hsv-color-model-c | ||
* | ||
* Converts an HSL color value to RGB. Conversion formula | ||
* adapted from http://en.wikipedia.org/wiki/HSL_color_space. | ||
* Assumes h, s, and l are contained in the set [0, 1] and | ||
* returns r, g, and b in the set [0, 255]. | ||
* | ||
* @param Number h The hue | ||
* @param Number s The saturation | ||
* @param Number l The lightness | ||
* @return Array The RGB representation | ||
*/ | ||
function hslToRgb(h, s, l){ | ||
var r, g, b | ||
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if(s == 0){ | ||
r = g = b = l // achromatic | ||
}else{ | ||
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 | ||
} | ||
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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) | ||
} | ||
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export function randomColor() { | ||
let r = Math.floor(Math.random() * 150) + 50 | ||
let g = Math.floor(Math.random() * 150) + 50 | ||
let b = Math.floor(Math.random() * 150) + 50 | ||
return `#${componentToHex(r)}${componentToHex(g)}${componentToHex(b)}` | ||
} | ||
return [r * 255, g * 255, b * 255] | ||
} | ||
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export function randomColor() { | ||
let rgb = hslToRgb(Math.random(), 0.6, Math.random() * 0.4 + 0.4) | ||
return `#${componentToHex(rgb[0])}${componentToHex(rgb[1])}${componentToHex(rgb[2])}` | ||
} |