Repainting an interior wall
The current paint is extremely dark/bright but my new paint is the opposite shade
Assuming the wall is in good condition and the paints are chemically the same, you have a few options here. Great primer paintsexist now, which could be ideal for your situation. But you may want to compare prices and choose whichever option suits your budget.
Covering a bright color with an opposite shade will require multiple coats of new paint. It may make more sense to cover the old color in a primer, which is less expensive than your paint. This way, you will only need 1 to 2 coats of your actual color paint. The choice really comes down to what makes you (and your budget) comfortable.
*WARNING! If you scrape, sand, or remove old paint, you may release lead dust. LEAD IS TOXIC. EXPOSURE TO LEAD DUST CAN CAUSE SERIOUS ILLNESS, SUCH AS BRAIN DAMAGE, ESPECIALLY IN CHILDREN. PREGNANT WOMEN SHOULD ALSO AVOID EXPOSURE. Wear a NIOSH-approved respirator to control lead exposure. Clean up carefully with a HEPA vacuum and a wet mop. Before you start, find out how to protect yourself and your family by contacting the National Lead Information Hotline at 1-800-424-LEAD or log on to www.epa.gov/lead.