Color Picker Mobile is very easy to use just need to take dependency of ColorPickerMobile web block from ColorPickerMobile module and it'll ask for below parameters.

It has 4 Input parameters mentioned below -

InputId* (Text)  - Input field Id on which color picker will be attached.  

DefaultValue (Text)  - DefaultValue is always a string which contains a 7-character string specifying an RGB color in hexadecimal format.