Final answer:
The phrase 'Full palatable; and a colour grew' is a metaphor for taste and flavor, describing something becoming more appealing. The mention of 'a colour grew' can be seen as a reference to visual changes.
Step-by-step explanation:
The phrase 'Full palatable; and a colour grew' is a metaphor for taste and flavor. In this context, it is describing something becoming more appealing. The use of the word 'palatable' suggests that the taste or flavor of the subject is becoming more enjoyable or satisfying. The mention of 'a colour grew' can be seen as a reference to visual changes, as the color of the subject is intensifying along with the palatability.