Created and manipulated in Procreate 4 on iPad Pro with the Apple Pencil. Changing the hue, saturation, brightness and color balance gave me quite a few options. Two by two arrangement created in Diptic app.
Created on iPad Pro with Apple Pencil. First drawn in black and white then colored in the WorkVisual app. (1 & 2) Enhanced in Procreate 4. (3) Manipulated twice in the Affinity Photo app. (4 & 5)
Created in Procreate on iPad Pro with Apple Pencil.
Reference photo of design in a travertine tile.