Ok so when i color some bitcoin, the amount of bitcoin colored is not relevant, right ?
To go back to the applecoin :
If i create 100 applecoin for my apple growing company, can i just color 100 satoshi to trade?
What is the difference if i color 100 bitcoin?
Am i missing something?
You're right, it's not relevant because the amount is so small. But if you had for example 1,000 colored coins incoming transactions than you can uncolor them and recycle them back to bitcoins. Each transaction is 600 satoshis, so you would have 1000x600 Satoshis or 0.006 BTC ($2,64).