#7ab
Colors in the digital world are frequently expressed as a three digit hexadecimal number with each digits representing one of the colors Red, Green, and Blue. The original color given was #79b which means a red value of 7, a green value of 9, and a blue value of "b" which means 11. Since we just want a little more green, we can increase the 9 to 10, which is represented by the letter "a", giving us a new value of #7ab.
