How to read a target bar
How do you read the color bar when making a shot?
That's called the "shot breakdown bar," and has been disabled in the base-game. You need a mod or .ini tweak to enable it. The two I could find that add it are Perfect Information and Tactical HUD Tweaks
From the latter link:
Red = Hit, but not Crit
Yellow = Crit
Green = Graze
Gray = Miss
You still have all the numbers all around the bar. From the numbers given, I deduce that red is "normal hit", yellow is "critical", green is "dodge", and gray is "miss". Snipe away!