about golden hand, green thumb and the redheaded women

There are people who can repair anything, and to make a wooden table, build a summer cottage, connect electricity, whatever. In English such person is called 'handyman' or 'jack-of -all-trades', in Poland we have phrase 'golden hand'. I used this term to describe someone in Finland and no one knew what I meant. I was sure it was international saying. In Finland 'handyman' is called 'repsikka' and 'jokapaikan höylä'. So I checked what kind of similar sayings are in use in Finland.
First what came to my mind was 'a green thumb' (vihreä peukalo), what I heard also in English in version of the green fingers or a thumb. If someone has a green thumb it means that he has talent for growing plants and flowers. I do not have a green thumb and when I put seeds into soil, I get few straws of sth in few weeks. Our neighbour has a green thumb and gets amazing flowers on his balcony every summer (for example 2m high sunflower last year despite his balcony gets less sunlight than our).
I have found most popular English colour idioms here. Part of them seems to be international like the green light, to be green with envy, black sheep.
Here's few Finnish sayings that include colour, which I found interesting:  

- harmaa aine literally 'grey substance' (software) term for knowledge and skills, refers to the brain's grey matter, (brain cells).

- mustasukkainen means literally 'in black socks' and this is not idiomatic but the main word for 'jealous'. There is another Finnish word containing 'black' (musta) for being jealous: 'mustankipeä'. 
I wonder why black?

There is popular saying, that forest is Finland's green gold (metsä vihreä kulta). Writing in a nutshell: the three-quarters of the land area is forest, forestry and forest industries have crucial importance for Finnish economy. (more on this subject in English I found here and here)

Continuing with colors ... 
There is Finnish saying that redheaded women do not go to heaven (punatukkaiset naiset eivät pääse taivaaseen). 
I have been thinking where this came from, there some articles in internet. Most of the hypotheses about this saying is combined with redheads' reputation of being a fiery-tempered.
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