Customize the TextBox Background-color and Text-color in React TextBox component

import * as React from "react";
import * as ReactDOM from "react-dom";

export default class App extends React.Component<{}, {}> {
    constructor(props: any) {
        super(props);
    }
    public render() {
        return (
            <div className="wrap">
            <label> Normal Input </label>
            <div className="e-input-group">
                <input className="e-input" onFocus= {this.floatFocus} onBlur= {this.floatBlur} type="text" placeholder="First Name"/>
            </div>
            <label> Floating Input </label>
            <div className="e-float-input">
                <input type="text" required={true} />
                <span className="e-float-line"/>
                <label className="e-float-text">Last Name</label>
            </div>
        </div>
        );
    }
    private floatFocus(args: React.FocusEvent): void {
        ((args.target as HTMLElement).parentElement as HTMLElement).classList.add('e-input-focus');
    }
    private floatBlur(args: React.FocusEvent): void {
        ((args.target as HTMLElement).parentElement as HTMLElement).classList.remove('e-input-focus');
    }
}
ReactDOM.render(<App />, document.getElementById('input-container'));

/* To change the background-color and text-color for textbox */ 
.e-input-group,
.e-float-input,
.e-float-input.e-input-group { 
  background : lightgray;
  color: green;
}

/* To change the border-color of the textbox */ 
.e-input-group:not(.e-success):not(.e-warning):not(.e-error):not(.e-float-icon-left),
.e-input-group:hover:not(.e-success):not(.e-warning):not(.e-error):not(.e-float-icon-left) {
  border-color: #0800ff;
}

/* To change the border-color of the floating-label textbox */ 
.e-float-input input,
.e-float-input:hover:not(.e-input-group):not(.e-success):not(.e-warning):not(.e-error):not(.e-disabled) input:not([disabled]) {
    border-color: #0800ff;
}

#loader {
  color: #008cff;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}
#input-container {
  width: 240px;
  margin: 0 auto;
  padding: 20px 0px;
}

.wrap {
box-sizing: border-box;
margin: 0 auto;
padding: 20px 10px;
width: 260px;
}

.wrap label {
font-weight:bold;
}

.wrap .e-float-input {
 margin:30px 0;
}

.wrap .e-input-group {
 margin:25px 0;
}