Since Sin Terrna Oufit is originally outfit for Dark Knight,

I come up with an idea to reverse the dark colors with light while keeping the purple aura which stand for the power of it.

I have more choice of colors with new Merv's color palette, and then

White Sin Terrna is born.

Before	After

Dark	Light

How could I archive this:

1. Just open the Dye screen by pressing J (as default) or open Dye in Esc (Settings) menu.

2. Picking the outfit that is availble for dying then select the equipment part. 

3. Select Merv's Palette, then click on the color palette on the top right menu.

4. Select the color of the pallete and it will change by your choice of part and color.

Repeat from step 2 until you complete dying or be satisfied with the color state of that equipment part.

Enjoy!

If you still get trouble with the screenshot/text guide, hope you find help with this video:

Thank you PA for your decision making Sin Terrna as Mystic's cosplay outfit.

So lovely / cưng gì mà yêu thế / ...

Update screenshot of result in dark and light environment.

It looks great >w< Underrated post here~!!