I spontaneously made a Winter resource pack because all of the packs I use during Winter to make the leaves white are broken!! :D

This is the Mizunos version of the Winter Leaves resource pack. To see the vanilla version, go here.

This pack changes all leaf colors* to white, the grass and foliage are
light shades of greyish blue, and every moss and azalea related item is
recolored a cool blue and yellow. There are a few other slight
adjustments, every flower and plant has been diluted slightly to fit the
foliage, the flowerpot is now blue, the default chests now have their
giftbox textures, and more!

Download for some wintery spirit in your Minecraft worlds, and let me know what you think in the comments. Happy Winter!

-Seer

*Pack requires Optifine for the Birch leaves to look white.