Spot colours are also known as Pantone colours - a single colour used in
commercial printing processes. A graphic designer will normally pick a
pantone (or spot colour) ie Patone 144, this is normally used in 2 colour
processes ie black and one other colour.
CMYK is also used by designers - this is 4 colours or known as 'full colour
process' in the print world.
RGB is Red, Green and Blue... and is 3 numbers and used by word.
You can find out the RGB colours if you know the Pantone or CYMK number in
Publisher (which supports RGB, CMYK, HSL and Pantone). For example create a
box in publisher and then colour it (right click, format picture, colours and
lines, fill, more colours, custom) with whatever you have ie Pantone 526,
click apply. Then go back into the box... change to RGB and the numbers
listed are: R: 122, G: 30, B: 153.
Write these numbers down... and tell Communications and Publications
department (make sure they write down and store somewhere).
Alternatively ask the original graphic designer what the RGBs numbers are...
Hope that helps. Sarah