Candle
Growth, and money — one of which is an old association and one of which is not.
These are associations the community holds, not settled fact — the more a reading is shared, the bolder it sits.
Green under Venus is old and well founded: growing things, fertility, gardens, the pleasant and the flourishing. Agrippa puts it there, Culpeper's herbal works the same territory, and the association survives intact into modern practice for growth, healing and luck.
Green for money is a different matter, and worth being honest about. That association is heavily reinforced by the United States dollar being green, which is a nineteenth-century printing decision rather than a magical inheritance. Practitioners in countries with brightly coloured banknotes are just as likely to reach for gold or brown. The correspondence works, in the sense that it is meaningful to the person using it — which is what colour correspondences do — but it is not ancient and should not be sold as such.
Used well, green suits work that needs to grow rather than arrive: a business building slowly, a garden, a recovery, a savings habit. White substitutes; brown gives the slower and more stubborn version.
Readings practitioners have offered, ordered by how many recognise them. Take what serves, leave the rest.
Carried forward
Nicholas Culpeper, The Complete Herbal (1653)
Culpeper assigns every plant a planetary ruler and treats the assignment as diagnostic — a Venusian herb for a Venusian complaint, or its opposite where the trouble is excess. Modern colour tables took over that structure and quietly dropped the diagnostic half, which is why they can feel arbitrary.
Carried forward
Common in contemporary practice
Green for slow growth and gold or brown for money outright, in practice run by people who noticed that their own banknotes are purple. The distinction is more useful than the tradition.
Credit what you carry. Much of this comes from living traditions, and some of it from traditions that are closed — held by particular peoples and not offered for general use. Where you know whose practice a reading came from, name them; where you don't, say that too.