BARCOwomens Elevate Pant Medical Scrubs Pants

i want to buy some for my gf´s bd but she is 5.1 ft tall and I dont understand if I need to buy the "small petite "ones or maybe "small tall"?

The black in the picture looks more gray than black. I purchased the impact black top does the black on the bottoms match?

What color is moonstruck? Grey or blue?

Do they run small or true to size I'm usually a sise x2?