Years later, when you need to repaint a patch or want to reuse a wall colour in another room, you’ll struggle to remember, “Yeh kaunsa exact shade tha?” Guessing from memory or old photos rarely matches perfectly.
If you keep a small folder or digital note with brand names, shade codes, and maybe a photo of each room after painting, you’ve basically created a colour library for your home. You can buy the exact same shade or deliberately choose a coordinated one.
Contractors change, painters forget, but your own record keeps continuity and makes future decisions smoother.