HOW TO Adjust a sky’s hue and lightness

1 Boost colours A

Press to go to Pixelmator Pro’s Color Adjustments workspace. Drag Vibrance right. This selectively boosts the saturation of common landscape colours such as green fields and blue skies (without over-saturating skin tones).

2 Darken blues

Scroll down to the Selective Color panel. Click the light blue swatch. Drag the Brightness slider left to –100%. To darken all shades of blue click the darker blue swatch and reduce its brightness to –100%.

3 Cyan sky

For a more creative look click both of the blue swatches and set their Hue slider to –10%. This adds a wash of cyan to the sky that evokes the colours in a retro seaside postcard. Cyan skies often turn up in movies too.