Questions about colour correctness, colour similarities and how to best use certain colours.

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What's the exact opacity and translucency of transparent bricks?

As answered in this question, transparent bricks are made of PC (polycarbonate) and as listed in this answer and on Brickipedia there are fourteen transparent colors: 40 Transparent (clear) 41 ...
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0answers
29 views

HiTechnic Color Sensor analog

HiTechnic sales support said that HiTechnic color sensor hasn't been manifactured yet. Currently it's out of stock in HiTechnic shop. Is there any analog of this sensor except NXT/EV3 color sensors?
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How do people get yellowish white bricks back to white?

I have purchased some old Lego sets which have been stood made up for sometime and the White sides on display have turned yellow and the Tan pieces have also changed colour. Is there any way of ...