I have two sets of a "juniors fit" type of scrub...low waisted, pockets on side..boot cut. I want to say they are called "urbane scrubs". They are made by nurses for nurses/healthcare staff.
As far as not seeing through any white....always wear nude undergarments!!! A woman in Victoria Secret told me that years ago because i am a white fanatic!!
Some nude shades dont show at all..some do a little bit. Depending on skin type. So hold it underneath of what you are going to wear to get an idea....hope it works out!!!

For those cold winters...Walmart sells a thin legging (white) that works wonders!! Only $6.97 and you cannot see a thing!