Hey KinDaKreator,
The lighting on HTML5 is related more towards mobile lighting than what you’d see on a console system, or a PC game. The best solution that I’ve found to help counter the muted lights is adding more intensity to them. I’m hoping that within time the lighting will get better.
You should definitely post a link of your game if you’re able to. I’d love to see what you created, as I’m sure everyone else would too! 