Here i experimented with colours to brand the different series. i tried pastels, bold colour and with using 2 different colours. I like the bold colours chosen to the left hand side all relaxing colours but still eye catching.

I then looked into making a small symbol for each colour. i tried a small illustration but i preferred the lettering. 

I then chose my slogan for each category trying to relate them as best as possible. 

I then applied the symbol to the logo to see if they work together which i think it does.