ColorWithTransparency

colorUtils.kt

fun String.toTransparentColor(num: Int): String {
    return "#" + when (num) {
        100 -> "FF"
        99 -> "FC"
        98 -> "FA"
        97 -> "F7"
        96 -> "F5"
        95 -> "F2"
        94 -> "F0"
        93 -> "ED"
        92 -> "EB"
        91 -> "E8"
        90 -> "E6"
        89 -> "E3"
        88 -> "E0"
        87 -> "DE"
        86 -> "DB"
        85 -> "D9"
        84 -> "D6"
        83 -> "D4"
        82 -> "D1"
        81 -> "CF"
        80 -> "CC"
        79 -> "C9"
        78 -> "C7"
        77 -> "C4"
        76 -> "C2"
        75 -> "BF"
        74 -> "BD"
        73 -> "BA"
        72 -> "B8"
        71 -> "B5"
        70 -> "B3"
        69 -> "B0"
        68 -> "AD"
        67 -> "AB"
        66 -> "A8"
        65 -> "A6"
        64 -> "A3"
        63 -> "A1"
        62 -> "9E"
        61 -> "9C"
        60 -> "99"
        59 -> "96"
        58 -> "94"
        57 -> "91"
        56 -> "8F"
        55 -> "8C"
        54 -> "8A"
        53 -> "87"
        52 -> "85"
        51 -> "82"
        50 -> "80"
        49 -> "7D"
        48 -> "7A"
        47 -> "78"
        46 -> "75"
        45 -> "73"
        44 -> "70"
        43 -> "6E"
        42 -> "6B"
        41 -> "69"
        40 -> "66"
        39 -> "63"
        38 -> "61"
        37 -> "5E"
        36 -> "5C"
        35 -> "59"
        34 -> "57"
        33 -> "54"
        32 -> "52"
        31 -> "4F"
        30 -> "4D"
        29 -> "4A"
        28 -> "47"
        27 -> "45"
        26 -> "42"
        25 -> "40"
        24 -> "3D"
        23 -> "3B"
        22 -> "38"
        21 -> "36"
        20 -> "33"
        19 -> "30"
        18 -> "2E"
        17 -> "2B"
        16 -> "29"
        15 -> "26"
        14 -> "24"
        13 -> "21"
        12 -> "1F"
        11 -> "1C"
        10 -> "1A"
        9 -> "17"
        8 -> "14"
        7 -> "12"
        6 -> "0F"
        5 -> "0D"
        4 -> "0A"
        3 -> "08"
        2 -> "05"
        1 -> "03"
        0 -> "00"
        else -> "00"
    } + this.substring(1)
}