how to convert rgb color to color name string in javascript
let btn = document.querySelector("#demo");
let css = getComputedStyle(btn);
console.log(css.color);
output is in rgb value rgb (255,0,0)
You need to convert the RGB string to a hex value, and then you can compare it against a list like this of HTML color names.
const colors={aliceblue:"#f0f8ff",antiquewhite:"#faebd7",aqua:"#00ffff",aquamarine:"#7fffd4",azure:"#f0ffff",beige:"#f5f5dc",bisque:"#ffe4c4",black:"#000000",blanchedalmond:"#ffebcd",blue:"#0000ff"};
// Pass in the string
function toHex(rgb) {
// Grab the numbers
const match = rgb.match(/\d+/g);
// `map` over each number and return its hex
// equivalent making sure to `join` the array up
// and attaching a `#` to the beginning of the string
return `#${match.map(color => {
const hex = Number(color).toString(16);
return hex.length === 1 ? `0${hex}` : hex;
}).join('')}`;
}
// Now just iterate over the colors object and return the
// key from the property where the value matches the hex value
function findColor(hex) {
const pair = Object.entries(colors).find(([key, value]) => {
return value === hex;
});
return pair[0];
}
const hex1 = toHex('rgb(255, 228, 196)');
console.log(findColor(hex1));
const hex2 = toHex('rgb(127, 255, 212)');
console.log(findColor(hex2));