Is there a color code for transparent in HTML? - Stack Overflow
https://stackoverflow.com/questions/18189201/is-there-a-color-code-for-transparent-in-html
webAug 12, 2013 · Technically, the "transparent" color keyword is a shortcut for rgba (0,0,0,0), a fully transparent black, vgl. developer.mozilla.org/en-US/docs/Web/CSS/…. When you have a 6 digit color code e.g. #ffffff, replace it with #ffffff00. Just add 2 zeros at the end to make the color transparent.
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