Hmmm let’s see

Saki: probably a hazy lavender color. Very soft though slightly anxious

Lucia: Probably a shimmery icy blue - very vibrant and energetic. People who sense them can feel her adventurous vibes and would feel invigorated like drinking a good coffee

Creed: warm and robust, and one could feel at ease around his aura. Probably feels and looks like a warm fire on a cold night