如何轻松地将rgb颜色值转换为十六进制颜色值?

使用 printf 或 sprintf 具有 %x 总体安排

my ($r,$g,$b) = (12,102,250);
printf("#%02x%02x%02x",$r,$g,$b);

输出:

#0c66fa

以下是一种方法:

my @rgb     = (102, 205, 0);
my $hex_rgb = sprintf "#%02X%02X%02X", @rgb;

function colorToHex(color) {
    if (color.substr(0, 1) === '#') {
        return color;
    }
    var digits = /(.*?)rgb\((\d+), (\d+), (\d+)\)/.exec(color),

        red = parseInt(digits[2], 10),
        green = parseInt(digits[3], 10),
        blue = parseInt(digits[4], 10),

        rgb = blue | (green << 8) | (red << 16);
    return digits[1] + '#' + rgb.toString(16);
}

Fiddle