Blue's history dates back to Ancient Egypt, while light blue began to be used in the 1900s. It is a color that represents calmness and peace. And if you are looking for gradients colors here is: Light blue gradients
#F3F9FC
#E7F2F7
#C9E4EE
#ADD8E6
#62B5CE
#3E9CB9
#2E7E9B
#26667E
#235669
#224858
#162F3B
#add8e6
#fff3cd
#d8ecf3
#e9cece
#feb086
#ffc0cb
#ffe6a1
#f5f5dc
#6b2c62
#ff8aff
#6de1a7
#9a9aeb
#008080
#ccd5ae
#e9edc9
#fdfded
#ffad5c
#f7c23b
#f9ce62
#fad881
Related: Blue gradients