Generates Random Color String

RandomColorStringGenerator.kts

import java.lang.StringBuilder
import kotlin.random.Random

fun generateRandomColorString(): String {

    val numNum = Random.nextInt(1, 6)

    val alphaNum = 6 - numNum

    val string = StringBuilder()

    var i = 0
    val alphaArray = arrayOf("A", "B", "C", "D", "E", "F");
    while (i < alphaNum){
        string.append(alphaArray.random())
        ++i
    }

    i = 0

    if (numNum > 0) {
        loop@ while (true) {
            for (j in 1 until 6) {
                if (Random.nextBoolean()) {
                    string.insert(i, "${Random.nextInt(1, 10)}")
                    ++i
                }
                if (i == numNum)
                    break@loop
            }
        }
    }

    return string.insert(0, '#') .toString()
}