There are certainly other ways to achieve the same result so do check them out and give them a try. You can find the complete code on my GitHub repository. We've successfully built a random hex color generator using HTML, CSS and a few lines of JavaScript. Then the cycle repeats itself until the 6th round is over at which time a full 6-digit hex code will have been generated.Īll that's left is to set the textContent of the span tag and the background color of the page to be the value of hex. I can now access the hexValues array item in the position corresponding to the generated index number using bracket notation, then add it to the end of the hex variable i.e hex += hexValues. The random whole number generated is appended to a new variable index. Im working on a project where I need to generate an undefined number of random, hexadecimal color codeshow would I go about building such a function in. How To Generate a Random Color in JavaScript Chris Coyier on (Updated on Feb 19, 2020) Here’s a quicky (there is a PHP versiontoo): var randomColor Math.floor(Math.random()16777215).toString(16) See the Pen Generate New Random Hex Color with JavaScriptby Chris Coyier (chriscoyier) on CodePen. ![]() This makes sure that any number generated is a valid hexValues index. It basically rounds it down to the nearest whole number. We start with a random number to multiply with white color (Hex Code is 0xFFFFFF ), now we have to. So what do we do if we want a whole number larger than 1? We multiply it by the number we want (in this case, the length of the hexValues array) and wrap it within the Math.floor() function which returns the largest integer less than or equal to a given number. Short and effective script to generate random hex color. Now, the Math.random() function picks a random number between 0 and 1 (not including 1) and returns a decimal but we don't want decimals. You need to pad with zeros when the random value is less than. ![]() Then it loops over the hexValues array 6 times and each time generates a random number using Math.random(). There are a variety of methods in the blog post Random hex color code generator in JavaScript. Enter fullscreen mode Exit fullscreen modeĮvery time the button is clicked, the changeHex function is called which creates a variable hex and sets its value to #.
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