http://paletton.com/#uid=1000u0kllllaFw0g0qFqFg0w0aF


http://www.colorcombos.com/black-and-white-color-schemes.html


http://www.colourlovers.com/web/palettes


https://color.adobe.com/create/color-wheel/?base=2&rule=Analogous&selected=3&name=My%20Color%20Theme&mode=rgb&rgbvalues=0,0.8415090030498504,1,0.91,0.8607153279948386,0.04550000000000004,1,0,0,0.05362198235978112,0.4820663032047579,0.91,0.7577276159272855,1,0.050000000000000044&swatchOrder=0,1,2,3,4


These are some popular website for Designers to choose color combinations.
Try these, it will help you.