In case you sometimes struggle to visualise the RGB colour space on a computer, American artist Tauba Auerbach has created a handy reference guide: a cubic book that shows off all the colours in existence.
Measuring 8 inches in each dimension, the book illustrates the entire three-dimensional RGB colour space, with each page turn showing a subtly different slice of colour. In fact, three different books exist, with the spines cut along different axes—but given their size, combined they'd take up an awful lot of shelf space. [Tauba Auerbach via Design Boom]
Image by Tauba Auerbach