geopackage-sdk/src/main/java/mil/nga/geopackage/extension/style/StyleRow.java
private Color createColor(String hexColor, Double opacity) {
        Color color = null;
        if (hexColor != null || opacity != null) {
            color = new Color();
            if (hexColor != null) {
                color.setColor(hexColor);
            }
            if (opacity != null) {
                color.setOpacity(opacity.floatValue());
            }
        }
        return color;
    }
private Color createColor(String hexColor, Double opacity) {
        Color color = null;
        if (hexColor != null || opacity != null) {
            color = new Color();
            if (hexColor != null) {
                color.setColor(hexColor);
            }
            if (opacity != null) {
                color.setOpacity(opacity.floatValue());
            }
        }
        return color;
    }
Create a color from the hex color and opacity

@param hexColor hex color
@param opacity  opacity
@return color or null