Whats the chance my kids eyes are going to change?

my kids are 2 1/2 and 8 months, my oldest one has pale blue eyes and my youngest has a kind of turqoise colour. I know normally there eyes would have fixed by now but I had deep blue eyes until I was five and they are now a bluish green and hubby has brown eyes. do you think there eyes will stay the colour they are now or are they more likely to change?