Specifying Colour - Oki OKIPAGE 8c Colour Manual

Although colour has its obvious benefits, it has also created
a whole new set of problems that need to be dealt with:
• It is important not to go overboard and add dashes of colour without
thought as this will undoubtedly have a negative effect on the whole
purpose of using colour.
• Using colours which are considered garish will also affect the way in
which your document or presentation is perceived.
• The proximity of colours is also an important factor and it is best to
consider the result when certain colours are paired.
To minimize any problems it is important to use colour with
pre-planning and a great deal of care. If specific colours are
of paramount importance (such as those in a company logo)
then it is best to print these colours beforehand and note the
composition that gives the closest match to the required
colour. Then use the component amounts regardless of what
is displayed on the monitor.
12

Specifying colour

There are many different ways to specify colour and there
are many different models to cater for this. The colour wheel
as already shown, is a two-dimensional view of the HSL
model which is based on Hue, Saturation and Lightness as
components for specifying colour. The third dimension in
this case is lightness and describes the tendency towards
black or white.
Commonly used models are:
• HSL
• CMY(K)
• CIE, CIELab, CIELuv
HUE
SATURATION
LIGHTNESS
• HSB
• RGB
• YCC
OKIPAGE 8c