Greetings @summer2!
Sorry to hear you’ve been feeling stressed and anxious lately. Perhaps looking into aura work and/or chakra work would be a good option for you, if you feel you are being drawn to them?
For learning about Auras 
, I recommend checking out the resources and experiences shared in the previous Reading Auras Challenge.
For Chakras 
, there are many resources here in the forum. In addition to the info @Missa shared above, here are few for you to begin learning more about the world of chakras:
→ Ritual Meditations for Each of the Chakras
→ How to Check Chakras Using a Pendulum
→ Collection of Chakra Crystal Grids
And as for the colors you are being drawn towards, perhaps you might want to look into the meaning of each of those colors? In magick, colors have correspondences.
Pink : Relationships, love, tender emotions, bonds between people, relief from depression
Purple : Psychic powers, spirituality, other worlds, your consciousness
Blue : Water magick, creativity, change, harmony, guidance
White : Healing, protection, universiality
(You can find more color correspondences on the Spells8 Color Candle Magick Page)
Wishing you the best of luck with your magickal studies- I hope the colors you have been drawn to can help lead you finding peace, harmony, and relief from your stress!
Blessed be 