How to use the Color sliders to change color and remove color casts
When an image has a colorcast or a color that you’re wanting to play down in it, select the Color option in the HSL/Color/B&W panel. Here you can select the color to minimize the impact of and reduce its impact by dragging on the Saturation slider to reduce its saturation. Drag to the right on the Luminance slider to lighten the color.
This tool also allows you to take one color and alter its hue. So, for example you can target yellow and drag it towards green or towards orange by dragging on the Yellow Hue slider. In this way, any color in the image can be adjusted to one of its adjacent colors.