I love the thought of gray for the basic tone, and then just add pink/blue accents or gender neutral shades for accents if you want it to be a surprise!
42 Easy Nail Art Designs
Easy Nail Art Designs - Dry Brush Rainbow Tips - Step By Step, Simple Tutorials For Beginners For Summer, Fall, Spring, and Winter. Ideas For Nailart For Kids, For Toes, DIY, And Classy Ring Finger Ideas With Glitter. Also Some Great Ideas For Flowers, Paint, Stripes, And Black Nails - https://www.thegoddess.com/easy-nail-art-design