Cadet Grey (#91A3B0)

/* Background */
.element {
    background-color: #91A3B0;
}

/* Text */
.element {
    color: #91A3B0;
}

/* Border */
.element {
    border: 1px solid #91A3B0;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #91A3B0,
        #BEAEA2
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #91A3B0,
        #BEAEA2
    );
}

// SCSS variable
$cadet-grey: #91A3B0;

// With RGB channels (useful for rgba() usage)
$cadet-grey-r: 145;
$cadet-grey-g: 163;
$cadet-grey-b: 176;

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