New Stick Bug Owner

So I got (Indian) stick insects eggs on the 4th. Ive been purchasing everything i need, I now just need to get Privet leaves. I was sorting some stuff for the net, but just now i noticed that... one of them has a line of light colour. Is this one about to hatch? This is my first time owning stick insects and I can't find anything about lightening of colour online... a few others seem lighter but I'm not sure...?