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Usage of RGBA CSS Function
Use the CSS rgb() function to define color using the RGB Model.
Use the CSS rgba() function to set RGB colors with opacity.
You can try to run the following code to set color with rgba() function:
Example
<!DOCTYPE html> <html> <head> <style> h1 { background-color:hsl(0,100%,50%); } h2 { background-color:rgb(0,0,255); color: rgb(255,255,255); } p { background-color:rgba(255,0,0,0.9); } </style> </head> <body> <h1>Red Background</h1> <h2>Blue Background</h2> <p>This is demo text!</p> </body> </html>
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