KOTLIN CONSOLE WITH COLORS

colors.kt

//Main constants and functions
const val RC = "\u001b[0m" // Reset foreground and background colors. --> $RC
const val R = "\u001b[7m"  // Invert foreground to background. --> $R
const val U = "\u001b[4m"  // Underline. --> $U
const val B = "\u001b[1m"  // Bold. --> $B
const val I = "\u001b[3m"  // Italic. --> $I
const val S = "\u001b[9m"  // Strikethrough the text. --> $S

// 256 Colors
fun fg(n:Int) = "\u001b[38;5;${n}m" // Set a foreground color. --> ${fg(40)} //Sets a green color.
fun bg(n:Int) = "\u001b[48;5;${n}m" // Set a background color. --> ${bg(196)} //Sets a red color.

// RGB Colors
fun rgbfg(r:Int,g:Int,b:Int) = "\u001b[38;2;$r;$g;${b}m" // Set a RGB foreground color. --> ${rgbfg(0,255,0)} //Sets a green color.
fun rgbbg(r:Int,g:Int,b:Int) = "\u001b[48;2;$r;$g;${b}m" // Set a RGB background color. --> ${rgbbg(255,0,0)} //Sets a red color.

//Optional function
fun colorTest(){ // When called shows all 256 colors and they respectively numbers. --> colorTest()
    for(i in 0..9){print("\u001b[38;5;${i}m■$i   ")}
    for(i in 10..19){print("\u001b[38;5;${i}m■$i  ")};println("")
    for(i in 20..39){print("\u001b[38;5;${i}m■$i  ")};println("")
    for(i in 40..59){print("\u001b[38;5;${i}m■$i  ")};println("")
    for(i in 60..79){print("\u001b[38;5;${i}m■$i  ")};println("")
    for(i in 80..99){print("\u001b[38;5;${i}m■$i  ")};println("")
    for(i in 100..119){print("\u001b[38;5;${i}m■$i ")};println("")
    for(i in 120..139){print("\u001b[38;5;${i}m■$i ")};println("")
    for(i in 140..159){print("\u001b[38;5;${i}m■$i ")};println("")
    for(i in 160..179){print("\u001b[38;5;${i}m■$i ")};println("")
    for(i in 180..199){print("\u001b[38;5;${i}m■$i ")};println("")
    for(i in 200..219){print("\u001b[38;5;${i}m■$i ")};println("")
    for(i in 220..239){print("\u001b[38;5;${i}m■$i ")};println("")
    for(i in 240..255){print("\u001b[38;5;${i}m■$i ")}
}