Color is a regulated ingredient
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The structure
Color additives are listed by regulation: part 73 holds those exempt from certification, part 74 those subject to certification, and part 82 the provisional listings. A color is permitted for a particular use because a regulation lists it for that use.
Certification is a batch process
The colors in part 74 are subject to certification under section 721(c) of the Act, which is why 101.22(k)(1) points at that part when it requires them to be named. A certified color carries a batch identity behind it.
Listed for a use, not listed in general
A color cleared for one food category is not thereby cleared for every one, and some listings carry limits. So the question to ask a supplier is which regulation lists this for the use you intend.
Which makes "food grade" an unhelpful phrase
It is not a defined term in the regulation and it is used loosely in trade. The defined position is a listing in part 73, 74 or 82 for the use, and that is what a specification should state.
Four of the nine leaves here are colorants
Food coloring, cake decor, sprinkles and edible glitter. So for most of this group the color is not an incidental additive, it is the product, which is an unusual position among the properties in this library.
And the declaration follows from the listing
Whether you may write "Artificial Color" or must write "Blue 1 Lake" depends on which part the color sits in. The listing decides both legality and labeling, so it is one question rather than two.
Get the listing reference in writing
Not a marketing sheet. The regulation and the use it covers, from the supplier, kept with the formula. It is the single most useful document in this category.