I have always wondered: is there any way of determining whether you’ll be blue or purple before the game loads? Could help at chara select to plan early strategies (IE, getting golems on blue side with AD carry/support).
In the champion selection
If “Your team” has a blue flair, you will be the blue team (Lower left corner)
If “Your team” has a purple flair, you will be the purple team (Upper right corner)
Source : Link , Question Author : ExcelBeyond , Answer Author : JonathanDavidArndt