Well beside the dietary laws Brian which we still believe are applicable not everything in the old testament scriptures are shadow laws. According to the scriptures in Hebrews it is the Mosaic "
shadow laws" for remission of sins under the old covenant that are fulfilled in Christ as God's sacrifice for the sins of the world once and for all *John 1:29; John 1:36; Hebrews 10:10 and Jesus is now our Great High Priest of the order of Melchizedek according to Hebrews 7:1-25 who know ministers on our behalf in the heavenly Sanctuary of which the earthly was only a copy based on better promises. So this whole old testament covenant or system of the laws for remission of sins (Levitical Priesthood, under an earthly Sanctuary, animal sacrifices and sin offerings, circumcision and the Feast days) are fulfilled and now continued in Christ under God's plan of salvation under the new covenant based on better promises *Hebrews 8:1-13; see also Hebrews 7:1-25; Hebrews 8:1-13; Hebrews 9:1-27 and Hebrews 10:1-22. These being all "shadow laws" having their fulfillment in God's new covenant promise and the body of Christ *Colossians 2:17. Where we have "shadow sabbaths" in the annual Feast days pointing to Gods' work in the new covenant in the ministration of Jesus. The shadow sabbaths of the annual Feast days are not the same as God's 4th commandment which is a memorial of the finished work of creation so it actually points backwards and not forwards to things to come. As posted earlier to someone else already if you look at the context of
Colossians 2:16 you will see that
Colossians 2:16 is not talking about the "seventh day" Sabbath of God's 4th commandment. It is talking about the sabbaths or sabbath days (Genitive neuter plural in the Greek) not singular while the scripture context is to the meat and drink offerings and new moons and sabbaths (plural)
in the Feast days which is the scripture context. According to the scriptures there were many different types of sabbaths in the old covenant. In the annual Feast days for example that
Colossians 2:16 is talking about there were many sabbaths that were linked directly to certain Feasts and would fall on any day of the week depending on the yearly cycle. These Feast day sabbaths (not Gods 4th commandment) included for example; (1) Feast of Unleavened Bread (first and last day) *
Leviticus 23:6-8 (2) Feast of Trumpets *
Leviticus 23:24-25 (3) Day of Atonement *
Leviticus 23:27-32 (4) Feast of Booths *
Leviticus 23:34-36 (5) Feast of First Fruits *
Leviticus 23:39 (6) Feast days of Holy convocation of no work (sabbaton
Colossians 2:16 *
Leviticus 23:7-8; 21;24; 27; 35-36. So context of
Colossians 2:16 is to the Sabbaths in the annual Feast days being a "shadow of things to come"
Colossians 2:17 not God's 4th commandment of the 10 commandments because God's 4th commandment does not point forward to things to come but backwards to the finished work of creation and God as the creator of heaven and earth as a memorial of creation - "Remember" the Sabbath day to keep it holy *Exodus 20:8.
Hope this is helpful.