Dark Pastel Green (#03C03C)

/* Background */
.element {
    background-color: #03C03C;
}

/* Text */
.element {
    color: #03C03C;
}

/* Border */
.element {
    border: 1px solid #03C03C;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #03C03C,
        #FE82D9
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #03C03C,
        #FE82D9
    );
}

// SCSS variable
$dark-pastel-green: #03C03C;

// With RGB channels (useful for rgba() usage)
$dark-pastel-green-r: 3;
$dark-pastel-green-g: 192;
$dark-pastel-green-b: 60;

// Usage
.element {
    background-color: $dark-pastel-green;
    color: rgba($dark-pastel-green-r, $dark-pastel-green-g, $dark-pastel-green-b, 0.8);
}