Mammals in general have color vision of a limited type, and usually have red-green color blindness, with only two types of cones. Humans, some primates, and some marsupials see an extended range of colors, but only by comparison with other mammals.
snare (plural snares) 1  A trap made from a loop of wire, string, or leather. ( 2 rare) A mental or psychological trap; usually in the phrase a snare and a delusion. Shakespeare If thou retire, the Dauphin, well appointed, / Stands with the snares of war to tangle thee.
Root renders your target unable to move, but still able to attack/shoot/use spells etc.. Snare is simply a slow of the target's movement speed. And lastly a Stun makes your target unable to move or use any abilities (with the exceptions of abilities that explicitly state that you can use them while stunned).