Hex colors: Numeric representation for “transparent”?

Question

I am building a web CMS in which the user can choose colours for certain site elements. I would like to convert all colour values to hex to avoid any further formatting hass

Answer 1

Transparency is a property outside the color itself, also known as alpha component. You can't code it as RGB.

If you want a transparent background, you can do this:

background: transparent;

Additionally, I don't know if it might be helpful or not but, you could set the opacity property:

.half{
  opacity: 0.5;
  filter: alpha(opacity=50);
}

You need both in order to get it working in IE and all other decent browsers.

Answer 2

Use following hexadecimal code for transparent text colour: #00FFFF00