- $colorPreview.find('.color-preview-header').attr('style', `background-color: ${gradient_start}; background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, from(${gradient_start}), to(${gradient_end})); background-image: -moz-linear-gradient(-90deg, ${gradient_start}, ${gradient_end});`);
+ $colorPreview.find('.color-preview-header').attr('style', `background-color: ${gradientStart}; background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, from(${gradientStart}), to(${gradientEnd})); background-image: -moz-linear-gradient(-90deg, ${gradientStart}, ${gradientEnd});`);