[Quran 7:26] "O children of Adam, we have provided you with garments to cover your bodies, as well as for luxury. But the best garment is the garment of righteousness. These are some of God's signs, that they may take heed."
Lower your gaze and to guard their private parts and not to show their adornments except that of it which normally shows. They shall cover their cleavage with their ‘khimar’..... They shall not strike their feet so as to reveal details of their hidden ornaments. You shall repent to God all you believers, so that you may succeed." 24:31
‘O prophet! tell thy wives and daughters and the believing women that they should cast their outer garments over their persons (when in public): that is most convenient that they should be known (as respectable women) and not molested: and Allah is Oft-Forgiving Most Merciful.’ 33:59
No where in these verses supposedly about dress code does it stipulate that women should don a hijab or dress in a specific way at all. It mere tells the individuals to cover the private parts and not draw too much attention to yourselves.