style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

* {
    margin: 0;
    padding: 0px 2px;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}


.popup{
    width: 350px;
}

.popup :where(.picker, header, .all-colors, .color){
    display: flex;
    align-items: center;
}

.picker{
    padding: 30px 0;
    justify-content: center;
    background: #e3f2fd;
}

#color-picker{
    outline: none;
    border: none;
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 5px;
    padding: 10px 20px;
    background: #5372f0;
}

.picked-colors{
    margin: 10px 15px;
}

header{
    justify-content: space-between;
}

.clear-all{
    color: #5372f0;
    cursor: pointer;
    font-size: 0.9rem;
}

.all-colors{
    margin: 10px 0;;
    flex-wrap: wrap;
}

.color{
    cursor: pointer;
    margin-bottom: 10px;
    width: calc(100% / 3);
}

.rect{
    display: block;
    height: 22px;
    width: 22px;
    margin-right: 8px;
    border-radius: 5px;
    border-style: solid;
    
}

.value{
    font-size: 0.96rem;
    font-weight: 500;
    text-transform: uppercase;
}