my eyes were blue and now they are brown?!

its just not fair my skin is naturally pale the parts that arent hit by the sun but my natural skin color is white pale and now my pretty blue eyes left me and went to stupid hideous brown eyes.sigh. why is this my dad had green eyes blonde hair and pale skin german charecteristics and my eyes left for some stupid brown. is my genitics for brown or blue? its kind of confusing because my dad caries green and blue genes and my other half brothers are made with 2 brown eyed parents for as mine my dad of course was green eyes my mom had brown eyes. my half brother came out with grey eyes i think and mine were blue explain that its confusing since my dad has green eyes its kind of hard. but mainly i want you to answer why my eyes changed AND are my natural genetics for blue or for brown. please