Why does my contact lenses form a black outline around my pupil?

So I wear colored contacts (hazel) and it forms a black outline around my pupil … which makes it look weird. Why is that? I use FreshLook, is there any other brand that doesn’t do that?

Maybe the colour runs.

Random: COLOR CONTACTS!

SURYA HENNA – Ash Blonde 2.31 oz – Henna Creams 2.31 oz $8.25 Surya Henna Cream is a temporary coloring and hair treatment, in a ready – to – use cream presentation. Practical and easy – to – use, it is a natural and organic product, made from rare and exotic herbs and fruits of Brazil – Amazônia – and India. This product also colors white hair, with no peroxide, heavy metals or ammonia. UPC: 7896544700680 Front Label Panel: Surya Henna Cream Hair Coloring …

FresHLook Contact Lenses [Pure Hazel 3-tone] $17.99 Freshlook ColorBlends from Ciba Vision (formerly Wesley Jessen). Freshlook Blends are available in Blue, Green, Grey, Brown, Honey, Turquoise, Amethyst, Pure Hazel, and True Sapphire…

GEO Berry Cessy Color Contacts, hazel / gold / honey 14mm Price per pair. Authentic GEO…