I used the color from his shorts and started drawing in the pants and sleeves.
step 2 of 4
I also desaturated the red shirt and used some of the texture.
step 3 of 4
drew in the umbrella
step 4 of 4
I drew in the splash with a soft brush and several dots. I used smudge for the main splash. I also used smudge to blend the textures, and made other clean ups. I colored in shadows in the puddle.