The color picker includes an opacity slider, shown in the following screenshot.
The opacity slider on the right uses the RGBa alpha channel, rather than an
opacity CSS attribute. When you move the opacity slider, you’ll see the hex color value change to RGBa settings to reflect the requirement of the alpha channel. You can also set your own RGBA values instead of hex values for colors.
- To add your own RGBa values, move the right-hand opacity slider until the color field converts to RGBa values, then enter your RGBa value.
- If you see only gray values in your color picker, move the saturation slider to the right.