I have a table visual in Amazon QuickSight with multiple columns (A, B, C, D, E) and around 10000+ rows.
Column A is a dimension with high cardinality (1000+ distinct values). I want to visually differentiate rows in the table using background colors so that the table is easier to read.
I do not want to manually define conditional formatting rules for each value and the goal is purely visual differentiation of rows.
You cannot currently auto assign a unique background color per high cardinality value in a Quick table, but you can get close using two approaches, built‑in row banding, or a calculated band field used in conditional formatting.
Open the table visual → Format visual → Cells. Under Background, turn on Alternate background colors between rows, then set Odd rows and Even rows to two subtle colors.
Please refer to the below Quick documentation and community post this might be helpful for you.