Sovereign Hobbies has an on line chart for RN colours. They also produce the Colour Coats line of paint.
Tom's Model works (Richard Harden) sells Colour Coats here in the USA, but I don't know about Canada.
507 A or C would be the offical RN color names for the dark and light paints, semtex was dark red, green, or tan, depending on the time frame.
I think Tamiya & Humbrol have designated color matches also.
There's several other such color charts out there,
I have the "Vallejo WWII Naval Color Equivalents Navy" chart, it's a pdf I got on line.
Hope this helps, David