colors – part 3 k1066bi – graphical design teppo räisänen teppo.raisanen@oamk.fi

Colors – part 3K1066BI – Graphical DesignTeppo RäisänenTeppo.raisanen@oamk.fi

Colors

•Traditionally, red, blue and yellow are used as primary colors▫Used by painters

Colors

•In computer era we use more often either •RGB

▫Red, Green, Blue•CMYK

▫Cyan, Magenta, Yellow▫K comes from blacK

Colors

•RGB uses something called additive color model▫Used with TV’s▫Also used heavily with computers▫Normally, we have a black screen where we

add color

Colors

Colors

Colors

Colors

•CMYK uses something called substractive color model▫It is used e.g. in printing

Colors

•Normally printing is done to white paper▫Colors are done by substracting

(absorbing) certain wavelenghts from light and reflecting others

Colors

•As can be seen from the previous slide cyan, magenta and yellow do not produce deep enough black▫So fourth color – black - is usually used▫Thus the name CMYK▫K = blacK

•Also as black is used a lot e.g. in newspapers (all text is generally black) it savesinc to use black color

Colors

•When we print all CMYK colors one on top of another we see the final product