Color grading is the process of enhancing colors for stylistic, artistic, or aesthetic reasons. Color grading includes adjusting color to promote the mood or atmosphere of a photo with the exposure, contrast, vibrance, and tone curve color editing tools.
To use the grading tool on Lightroom Mobile, first, open the color grading tool. There, swipe on the color wheel to discover four separate color wheels for Shadows, Mid-tones, Highlights and Global control. The Global control applies luminance and color tint adjustments across all three tone ranges.
When you tap on the color wheel, two numeric values appear; Hue and Saturation.
The Hue value is the is the position of the color on the color wheel. The circle is made up of 360 degrees. The color red is 0 degrees. Going around the wheel, yellow is 60 degrees, green 120 degrees, cyan 180 degrees, blue 240 degrees and magenta 360 degrees.
The saturation value from 0 to 100 is the intensity of the color cast of that particular wheel; shadows, mid-tone, highlights or global.
Adjust the luminance using the sliders under each color wheel. To adjust how much your highlights, mid-tones, and shadows overlap, you can use the blending slider located underneath the color wheel(s). The balance slider, also located beneath the color wheel(s), allows you to switch the range between highlights and shadows by sliding left to right and vice versa.
Expert tip: Tap on the down arrow to reveal a slider for Hue and Saturation to achieve more precise control over tapping on the color wheel.