I went into the script file and modified the color on the text. the what_color="#000000" is what makes it unreadable. Just change them to the same color and they will display in the color of the Character's name. Modified script file attached.No there is no way unfortunately. I think I will have to darken the background part of the dialogue a bit more to solve the problem.
define nicole = Character("Nicole", color="#dc95dd", what_color="#dc95dd",font="Arial Black.ttf")
define liam = Character("Liam", color="#e9f034", what_color="#e9f034",font="Arial Black.ttf")
define angela = Character("Angela", color="#e9967a", what_color="e9967a",font="Arial Black.ttf")
define augusto = Character("Augusto", color="#5f9ea0", what_color="#5f9ea0",font="Arial Black.ttf")
define gianni = Character("Gianni", color="#dc143c", what_color="#dc143c",font="Arial Black.ttf")
define alexa = Character("Alexa", color="#e9f034", what_color="#e9f034",font="Arial Black.ttf")
define thomas = Character("Thomas", color="#6495ed", what_color="#6495ed",font="Arial Black.ttf") #papà di liam
define katrin = Character("Katrin", color="#dc95dd", what_color="#dc95dd",font="Arial Black.ttf") #mamma di liam
define corriere = Character("Courier ( Corriere)", color="#e9f034", what_color="#e9f034",font="Arial Black.ttf")
define sabrina = Character("Sabrina", color="#dc95dd", what_color="#dc95dd",font="Arial Black.ttf")
define pensieronicole = Character("Thinking Nicole (Pensiero)", color="#fff8dc", what_color="#fff8dc",font="Arial Black.ttf")
define pensieroangela = Character("Thinking Angela (Pensiero)", color="#fff8dc", what_color="#fff8dc",font="Arial Black.ttf")
define pensieromisako = Character("Thinking Misako (Pensiero)", color="#fff8dc", what_color="#fff8dc",font="Arial Black.ttf")
define pensierothomas = Character("Thinking Thomas (Pensiero)", color="#e9f034", what_color="#e9f034",font="Arial Black.ttf")
define misako = Character("Misako", color="#228b22", what_color="#228b22",font="Arial Black.ttf")
define piter = Character("Peter", color="#c0c0c0", what_color="#c0c0c0",font="Arial Black.ttf")
define peter = Character("Peter", color="#c0c0c0", what_color="#c0c0c0",font="Arial Black.ttf")
define luca = Character("Luca", color="#0000ff", what_color="#0000ff",font="Arial Black.ttf")