Red
Mix dried hibiscus flower powder or red sandalwood powder with cornstarch for a natural red
Yellow
Blend turmeric with besan (gram flour) or dry marigold petals for a bright yellow color
Green
Crush fresh spinach or neem leaves, dry them, and grind into a fine green powder
Blue
Dry and powder butterfly pea flowers or grind dried jacaranda flowers
Pink
Mix beetroot juice with arrowroot powder and let it dry for a soft pink hue
Orange
Blend dried saffron strands with cornstarch or dry and powder orange peel
Purple
Dry and grind jamun (black plum) skin or mix beetroot juice with flour