In this login form, there is an icon next to both the username and password entries. By placing the mouse cursor on each of the inputs, its color becomes a little lighter. The sign button in this code is pink. Everything the user enters in these forms is white.


HTML
<!-- This script got from www.devanswer.com -->
<div class="grid">
    <form class="form login">
        <div class="form__field">
        <label for="login__username"><svg class="icon">
            <use xlink:href="#icon-user"></use>
            </svg><span class="hidden">Username</span>
        </label>
        <input autocomplete="username" id="login__username" type="text" name="username" class="form__input" placeholder="Username" required>
        </div>
        <div class="form__field">
        <label for="login__password"><svg class="icon">
            <use xlink:href="#icon-lock"></use>
            </svg><span class="hidden">Password</span></label>
        <input id="login__password" type="password" name="password" class="form__input" placeholder="Password" required>
        </div>
        <div class="form__field">
        <input type="submit" value="Sign In">
        </div>
    </form>
    <p class="text--center">Not a member? <a href="#">Sign up now</a> 
    <svg class="icon">
        <use xlink:href="#icon-arrow-right"></use>
    </svg></p>
</div>
<svg xmlns="http://www.w3.org/2000/svg" class="icons">
    <symbol id="icon-arrow-right" viewBox="0 0 1792 1792">
        <path d="M1600 960q0 54-37 91l-651 651q-39 37-91 37-51 0-90-37l-75-75q-38-38-38-91t38-91l293-293H245q-52 0-84.5-37.5T128 1024V896q0-53 32.5-90.5T245 768h704L656 474q-38-36-38-90t38-90l75-75q38-38 90-38 53 0 91 38l651 651q37 35 37 90z" />
    </symbol>
    <symbol id="icon-lock" viewBox="0 0 1792 1792">
        <path d="M640 768h512V576q0-106-75-181t-181-75-181 75-75 181v192zm832 96v576q0 40-28 68t-68 28H416q-40 0-68-28t-28-68V864q0-40 28-68t68-28h32V576q0-184 132-316t316-132 316 132 132 316v192h32q40 0 68 28t28 68z" />
    </symbol>
    <symbol id="icon-user" viewBox="0 0 1792 1792">
        <path d="M1600 1405q0 120-73 189.5t-194 69.5H459q-121 0-194-69.5T192 1405q0-53 3.5-103.5t14-109T236 1084t43-97.5 62-81 85.5-53.5T538 832q9 0 42 21.5t74.5 48 108 48T896 971t133.5-21.5 108-48 74.5-48 42-21.5q61 0 111.5 20t85.5 53.5 62 81 43 97.5 26.5 108.5 14 109 3.5 103.5zm-320-893q0 159-112.5 271.5T896 896 624.5 783.5 512 512t112.5-271.5T896 128t271.5 112.5T1280 512z" />
    </symbol>
</svg> <div id="bcl"><a style="font-size:8pt;text-decoration:none;" href="http://www.devanswer.com">Developers Answer</a></div>
                        

CSS
:root {
	--baseColor: #606468;
}
.align {
	display: grid;
	place-items: center;
}
.grid {
	inline-size: 90%;
	margin-inline: auto;
	max-inline-size: 20rem;
}
.hidden {
	border: 0;
	clip: rect(0 0 0 0);
	height: 1px;
	margin: -1px;
	overflow: hidden;
	padding: 0;
	position: absolute;
	width: 1px;
}
:root {
	--iconFill: var(--baseColor);
}
.icons {
	display: none;
}
.icon {
	block-size: 1em;
	display: inline-block;
	fill: var(--iconFill);
	inline-size: 1em;
	vertical-align: middle;
}
:root {
	--htmlFontSize: 100%;
	--bodyBackgroundColor: #2c3338;
	--bodyColor: var(--baseColor);
	--bodyFontFamily: "Open Sans";
	--bodyFontFamilyFallback: sans-serif;
	--bodyFontSize: 0.875rem;
	--bodyFontWeight: 400;
	--bodyLineHeight: 1.5;
}
* {
	box-sizing: inherit;
}
html {
	box-sizing: border-box;
	font-size: var(--htmlFontSize);
}
body {
	background-color: var(--bodyBackgroundColor);
	color: var(--bodyColor);
	font-family: var(--bodyFontFamily), var(--bodyFontFamilyFallback);
	font-size: var(--bodyFontSize);
	font-weight: var(--bodyFontWeight);
	line-height: var(--bodyLineHeight);
	margin: 0;
	min-block-size: 100vh;
}
:root {
	--anchorColor: #eee;
}
a {
	color: var(--anchorColor);
	outline: 0;
	text-decoration: none;
}
a:focus, a:hover {
	text-decoration: underline;
}
:root {
	--formGap: 0.875rem;
}
input {
	background-image: none;
	border: 0;
	color: inherit;
	font: inherit;
	margin: 0;
	outline: 0;
	padding: 0;
	transition: background-color 0.3s;
}
input[type="submit"] {
	cursor: pointer;
}
.form {
	display: grid;
	gap: var(--formGap);
}
.form input[type="password"], .form input[type="text"], .form input[type="submit"] {
	inline-size: 100%;
}
.form__field {
	display: flex;
}
.form__input {
	flex: 1;
}
:root {
	--loginBorderRadus: 0.25rem;
	--loginColor: #eee;
	--loginInputBackgroundColor: #3b4148;
	--loginInputHoverBackgroundColor: #434a52;
	--loginLabelBackgroundColor: #363b41;
	--loginSubmitBackgroundColor: #ea4c88;
	--loginSubmitColor: #eee;
	--loginSubmitHoverBackgroundColor: #d44179;
}
.login {
	color: var(--loginColor);
}
.login label, .login input[type="text"], .login input[type="password"], .login input[type="submit"] {
	border-radius: var(--loginBorderRadus);
	padding: 1rem;
}
.login label {
	background-color: var(--loginLabelBackgroundColor);
	border-bottom-right-radius: 0;
	border-top-right-radius: 0;
	padding-inline: 1.25rem;
}
.login input[type="password"], .login input[type="text"] {
	background-color: var(--loginInputBackgroundColor);
	border-bottom-left-radius: 0;
	border-top-left-radius: 0;
}
.login input[type="password"]:focus, .login input[type="password"]:hover, .login input[type="text"]:focus, .login input[type="text"]:hover {
	background-color: var(--loginInputHoverBackgroundColor);
}
.login input[type="submit"] {
	background-color: var(--loginSubmitBackgroundColor);
	color: var(--loginSubmitColor);
	font-weight: 700;
	text-transform: uppercase;
}
.login input[type="submit"]:focus, .login input[type="submit"]:hover {
	background-color: var(--loginSubmitHoverBackgroundColor);
}
p {
	margin-block: 1.5rem;
}
.text--center {
	text-align: center;
}