He called an Apple engineer one weekend with an urgent request: the colour of one letter of an on-screen logo on the iPhone was not quite the right shade of yellow.
I spotted an enormous wall of paint in jars of every colour, and in every shade.
突然，我瞥见了一幅巨大的墙绘，那是用深浅不一、缤纷多彩的颜料绘制而成的。
3
To create a heat map, simply take any model of the system and shade or colour different areas of the model to indicate the ease or complexity of working on different each area.