Need help changing Placeholder font color within Email Input dialogue box

Hi I'm struggling with this a little bit. I'm able to change the color of the user text when they enter their email address. But the placeholder itself is written "Enter email" and can't seem to find where to change its color. Changing the font color in the Form>Form Group>Input Group>Email Input just changes the input font color but not the placeholder itself.

Appreciate any help

okay figured it out.. a bit trickier for beginner but I had to insert this custom css

input::-webkit-input-placeholder { color:rgba(255,255,255,0.65) !important; }

input::-moz-input-placeholder { color:rgba(255,255,255,0.65) !important; }

The !important I guess ensures it overrides bootstrap preference

thanks for the hint and reporting your findings. BTW, also the classic CSS styling works

but considering I'd consider acceptable in 2018 to just style the ::placeholder pseudoelement

::placeholder {
    color: red;