Colors are determined by a hex color. This aspect "hwvtc=0000FF" of the code determines the color. See w3schools.com Color Picker
0000FF = Blue
Mostly all of these images have a metric conversion, this part "alt=hwitransparentcolors" of the code is the image name. Put a "met" on the end of the image name to get the metric representation "alt=hwitransparentcolorsmet
". Easliy change the image width to match the font size on your page. Please use the code above if you want white or black font on your widget. The image will look much better.