If you are looking to refresh the color in your room via painting - you could go to the Home Depot or Lowes or Canadian Tire - but I definitely say you should start your painting journey at Sherwin-Williams.
For first-time DIYers in painting - they have pretty excellent knowledge base that they are super-willing to share.
For me and the BF - they may have overestimated our painting capabilities - but what I did enjoy is their color wall - even though we eventually decided to go for a neutral white - we still had 181 choices to choose from.
The paint finishes on their swatches are pretty accurate - in various lighting settings too - plus application and clean up was pretty easy once we were done - since the paint we got was water based.
Couple of cool good-to-know items:
1. Sign up for their preferred customer list - they can notify you when they have a 40% off sale on paint - which gives you a really good discount on really good paint.
2. There is an app for that - called colour match - it has their entire color catalogue - plus they'll color match if you are looking to replicate a color in real life. Bonus - it is free.
3. They also could create your customer profile; which tracks your paint color purchases up to 7 years - so that's handy so you don't need to worry about storing those paint chips somewhere.
Price-wise - Sherwin probably costs a bit more than the big box home hardware stores - but they more than make up for it in customer service - hence the four stars read more