Clash of the Color Kingdoms

I have for you two worlds colliding in a color battle. On one side, there are dark, muted colors. On the other, there are bright, vibrant colors. In the middle is the colorless, no man's land.

As you can see, two warriors have met each other in the middle, with their native color schemes trailing behind them. On the left side, there are warriors lined up behind the wall. There is also a flying surfboard with a color cannon. On the back of the tower, there's winch to lift a platform, allowing the warriors of the colorful side to get to the top. Their leader is none other than Unikitty! On the right side, there is a catapult that launches grayscale color bombs onto the opposing tower. The dark, muted tower has suffered some hits from the flying surfboard as well as from the "Color Jet." A snake-ipede (snake + centipede) is crossing from the dark, muted side to the colorful side in full attack.

Which side do you think will win?