A simple CSS trick that turns an image from Grayscale to colourisation. See the Pen [Colorize image](http://codepen.io/Darryl/pen/azYYgy/) by Darryl Dias ([@Darryl](http://codepen.io/Darryl)) on [CodePen](http://codepen.io). This adds Grayscale filter to the image, and lets you hover on to turn it into colour. Have a question? leave a comment below.