But I won't just tell you what to do, or how to do it - I will also explain why, so that you can actually learn to see and use paint and color like a pro.
First, calculate the actual paint product cost. Assume that at least two coats of paint will be needed for adequate coverage with any color change.

Normally, dining rooms are small or medium-sized rooms with less furniture to move, making for an easier and cheaper painting job. You can expect to pay $380 – $675 to paint a dining room.
Painters charge $1 to $3 per square foot to paint a room or interior of a house. The average cost to paint a room is $350 to $850, and the cost to paint a home interior is $1,200 to $3,900. Labor costs alone account for 70% to 85% of your total paint job. Interior Painting Cost Per Square Foot Calculator Measure Cost Per Square Foot Coverage Area $1 – $3 Floor Space $3 – $7 Interior Painting Cost Room Average Cost Interior Door $75 – $150 Bedroom $350 – $850 Master Bedroom $650 – $1,400 Bathroom $150 – $400 Kitchen $150 – $250 Living Room $600 – $2,000 Apartment / Condo $900 – $3,000 1,500 SF House $1,300 – $4,400 2,000 SF House $1,600 – $5,600 2,500 SF House $1,800 – $6,300