Here are some of my favorite colors in leaded enamels. As you will see I mostly use transparent enamels.

 A few great colors to get you started.

Yellows

B15

B30 …these two are true yellows

H24

N26

N27…these three are  green yellows

 

Orange

109    Shippo 

 

Red

B8

L19…Medium

L20…Dark

L21 very dark

 

Pink

N14

N16

L96

 

True Greens

N36

N37

N48

N39

 

Water Blues

H55

B238

B186

 

Sky Blues

L69

B13

B23

B25

 

Purple

L81 Dark

If there is a B in front of the numbers this means it is from Bovano Enamel Supply Others you can order from E-namels.com and the are Ninomiya Transparent Enamels

But there is nothing more important than making your own test places!