The difference between warm and cool white is the undertones they feature. Cool whites are backed by grey, blue or beige whilst warm whites tend to have subtle yellow, peach or pink undertones. You'd be surprised how big a difference this can make.
Warm whites are great at creating a cosy atmosphere. They work well with earthy, organic shades and are ideally suited to more traditional or country style homes. You'll love warm whites if your furnishings have natural hues and textures. For southern facing rooms, warm whites may help you to soften up a room that doesn't get a lot of sun.
If you're looking to create a modern, minimalist look in your home, then cool white is the colour for your walls. Cool whites also work well in rooms that get a lot of sun, as they tend to neutralise bright light.
Natural light has a big impact on the colours of your walls and white is no exception. If your room gets really bright from lots of sunlight, you may want to avoid a warm white that has yellow undertones on your walls. Try opting for a cooler white with blue undertones instead.
Whereas if you have a room that needs brightening up, adding a warm white on the walls or ceiling will help you to create more reflective surfaces and lighten up your room.
After you've chosen the white for your room, it's important to give your walls an undercoat first. This will ensure that you get the exact white on your walls that you planned for. An undercoat is especially important if you are going from a darker colour to a white. It will mask the darker coat and also help the new paint stick to the walls more effectively.
The lights in your home can change the appearance of the paint colour on your walls. LEDs are available in warm white and cool white so make sure that you choose the LED that suits the white you want on your walls.