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<html><head><style>#p1 {background-color:rgba(255,0,0,0.3);}#p2 {background-color:rgba(0,255,0,0.3);}#p3 {background-color:rgba(0,0,255,0.3);}#p4 {background-color:rgba(192,192,192,0.3);}#p5 {background-color:rgba(255,255,0,0.3);}#p6 {background-color:rgba(255,0,255,0.3);}</style></head><body><h2>RGB colors with opacity</h2><p>RGBA color values are an extension of RGB color values with an alpha channel - which specifies the opacity of the object.</p><p id="p1">Red</p><p id="p2">Green</p><p id="p3">Blue</p><p id="p4">Grey</p><p id="p5">Yellow</p><p id="p6">Cerise</p></body></html>