These aroma beads are uncolored and scented. These aroma beads can be used in sachet bags or poured directly into molds/cutters to make car freshies. Some fragrance oil is yellow and will turn the beads yellow. This is common. These beads can still be colored using mica powder or candle dye. Oven temps and times may vary. Test beads before making large quantities. We are not responsible for damages or messed up products.