The image is colored with Chameleon Pens (if you aren't familiar with these alcohol pens click the link for videos showing how they work)
Lighthouse - CG8, RD4 and a white Sakura gel pen was used to add a bit of texture to the white (note: make this as a last step to your coloring process to avoid damage to the nib when using alcohol pens)
Grass - GR3, YG3, OL3, YL2,BR5
Sky - BL3, PK3, C8, blender pen
The blender pen worked exactly as planned to reduce the amount of color in areas of the clouds to give a more natural look.