The combat level of your player, monster, or even a non-player is used to indicate to the difficulty in beating them during combat. The levels lower than yours will be displayed in shades of green while the levels slightly lower than yours will be displayed in a pale yellow shade. The levels that are exactly equal to yours will be displayed in yellow color while the ones higher than you will be displayed in shades of orange and red.
Every new player starts out at a combat level 3 and can reach up to a maximum level of 126 in Runescape 2 and a maximum level of 123 in Runescape Classic.
Use Runescape gold or OSRS gold to improve your combat level drastically
A lot of Runescape users make use of Runescape gold or OSRS gold to improve the skills and the combat level of their character. A lot of them even go as far as spending thousands of dollars of real-life money to buy Runescape gold and OSRS gold to level up quickly. It is quite understandable as anyone who loves this OSRS mobile game will want to be the absolute best at it.