This briefcase has a very handy format. Since it only comes in black, your colour choice is made very easy.
From Amazon
Kensington 'Kensington Laptop Roller Case - Contour 2.0 Business Laptop Roller for up to 17'' Inch Laptops, Wheeled Laptop Case, Ideal Cabin Bag for Men & Women (K60385WW)', Black
Compadvance
KENSINGTON Contour Business Laptop