A lot of folk on here ask about the shade west of Ireland golden-olive. Above is a photo illustrating what I believe may be the answer to its origins. Hopefully the Irish lads on here could shed some light on it....;-)
The seal fur shown was natural dyed in real picric acid which initially gives us the colour on the left.The stuff on the right is what happens to it after a month or so sitting on a sunny window sill. The picric reacts with sunlight or UV and changes it from yellow into what to my mind looks remarkably close to west of Ireland golden olive. In short, woigo and Old Picric as it is known as ,is one and the same.