Boostrap Placeholder Mixin:
@mixin placeholder($color: $input-color-placeholder) {
// Firefox
&::-moz-placeholder {
color: $color;
opacity: 1; // Override Firefox's unusual default opacity; see https://github.com/twbs/bootstrap/pull/11526
}
&:-ms-input-placeholder { color: $color; } // Internet Explorer 10+
&::-webkit-input-placeholder { color: $color; } // Safari and Chrome
}
now call it:
@include placeholder($white);