That's normal. Look at my ram usage for example.
Red and yellow are active things in use needing ram. Blue is not needed, it just speeds things up. Your phone will use free ram to speed things up, leaving a little bit free. When an app wants to actually use lots of ram, it empties the blue optional stuff. Windows does the same thing.
If the yellow and red are constantly high, then there's a high ram issue. You can act as if the blue doesn't exist
Red and yellow are active things in use needing ram. Blue is not needed, it just speeds things up. Your phone will use free ram to speed things up, leaving a little bit free. When an app wants to actually use lots of ram, it empties the blue optional stuff. Windows does the same thing.
If the yellow and red are constantly high, then there's a high ram issue. You can act as if the blue doesn't exist
