Why are some of my contacts grayed out?

[iMore Question]

Why are some of my contacts greyed out

Most of my contacts are greyed out, i can,t message them

 

[Just_Me_D]

Why are some of my contacts greyed out

Numbers that display in a grey color when entering them into the Messages app are usually numbers that you can't iMessage (home, work, and numbers associated with non-iPhones), however, that doesn't mean you can't send non-iPhone users SMS messages.