Apex domains cannot have CNAME records.
Question and response
Question
dig colorink.com. NS
Answer
colorink.com. 5 NS ns91.worldnic.com.
colorink.com. 5 NS ns92.worldnic.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0