The Five Elements, Mark by Mark
Earth (Prithvi). Browns, ochres, terracotta and squared forms. Earth carries weight and permanence, which suits real estate, construction and any business asking customers to commit money over years. Too much of it turns the mark heavy, so it needs white space around it.
Water (Jal). Blues, aqua, silver and curves that flow rather than turn sharply. Water reads as calm and knowledgeable, so finance, legal practice and healthcare lean here. The risk is coldness, which a warm accent fixes.
Fire (Agni). Red, orange, crimson and triangular or arrow-like forms. Fire is drive, appetite and visibility, which is why food, fitness and entertainment brands use it well. It tires the eye faster than any other family, so use it as the dominant colour or the dominant shape, rarely both.
Air (Vayu). Greys, pale blue, thin strokes and light diagonals. Air suggests movement and communication, so logistics, media and consulting brands sit here comfortably. Air-led marks can look weightless and usually need one anchoring element.
Space (Akash). White, cream, and the empty area inside and around the mark. In Vastu the centre of a plan stays open, and the same applies to a logo. A crowded centre reads as confusion.