Sometimes a delica colour can change its colour quite drastically over time. This is not the fault of Miyuki, its just one of those things - processes and chemicals change. The same happens in knitting and cross stitch. It is so frustrating to choose a colour, design something and then either run out halfway through (because you never have enough) or realise that design will not look the same for my customers.
I tend to work from a fairly small colour palette. When I first started this was out of necessity, I couldn't afford more. As time went on I realised customers appreciated that they didn't have to keep rebuying different colours to do my designs so I always tend to keep to my original colour palette. That is unless I feel a design would really benefit from a more rarely used colour. This is not a decision I take lightly, I will never introduce a colour the sake of it.
For the colours I do use a lot, I have a small set of drawers made for A4 papers. I lie the tubes (which hold about 50g) on their sides in rows in the number code order. This works for me because I am so used to the colours I know the codes by memory.
For colours I don't use a lot (of which I only tend to keep a few grams), I store these in a A4 box on top of my drawers filled with little boxes. Each little box has a label with a colour on, e.g. Red, Yellow etc. In this box I organise the beads by colour, so all red beads go in the red box etc
I find this method works well for me. For the most part I am using my main colours of which I keep a fair amount but there is a high turn over of them so no dye lot issues. When I decide that for a particular design I don't like my standard green, I then get out my box of greens and choose a colour from within that. I find that sometimes I will end up considering a different green I may not have considered initially. I do check this matches up to the bead colour ThreadABead is selling just in case, but as I only hold a few grams of them it is not a huge deal if it has changed colour, I can buy myself a new tube if needed.
I should also note that my set of drawers is not full of delica, there is plenty of space and I have a drawer dedicated to Fire polished, Bugles and other crystals. For these I organise by type AND colour and in the case of fire polished not by size. So I have a tube containing all orange fire polished beads in all sizes. This might seem a bit strange but I do rarely use firepolished and I don't have that many. I find it very quick to tip them out onto a bead tray and pick out the sizes I need, I am usually unsure of the size I need and tend to try out different sizes.
And finally something else I should let you know, as pretty as it may seem to store your beads out in the open, it is not a good idea especially if it is a sunny room. Some delica bead colours are UV sensitive so you will find the colours will change over time if left exposed, you are creating your own colour issues.