Start softly coloring the light color as the base. Then slowly add the darker colors (color it softly).
Then, begin blending the colors.
Use the white pencil to blend the lighter colors.
Prismacolor List
PC904 : Light Cerulean Blue
PC903: True Blue
PC901: Indigo Blue
PC933 : Violet Blue (Ultramarine 932 is not in the set)
PC938: White
PC935: Black
Drawing and Coloring Crystals
Select the lightest and darkest blues from your set.
Use the white pencil to blend the colors.
Use different purples to add highlight and shadows.
For the grass, color the lightest green first and use various shades of green to create the grass textures and shadows. Use dark blues to add shadows to the green.
Black was used to add the edge to the shadows.