NHL 19 Create a Team and EASHL club helmet color issue

Not a true solution, as I agree color wheel should be available, but a work around:

You can apply the precise color you want as you team colors and then in the helmet color select option to apply team colors. Once you have it as you like you can return to your team colors selection and revert it to as you like and the helmet will remain as the color you wanted... if you know what I mean.