3.3.5.1.2.1.3 Construction of Cache Color Table
The structure and fields of the Cache Color Table Secondary Drawing Order are specified in section 2.2.2.2.1.2.4. The order fields MUST be populated in accordance with this description.
The color tables that are cached by the Cache Color Table Secondary Drawing Order can be consumed by future MemBlt (see section 3.3.5.1.1.1.9) and Mem3Blt (see section 3.3.5.1.1.1.11) Primary Drawing Orders.
The cache ID and cache index to use are selected by the server based on the management policies that are implemented (for example, an LRU policy might be in effect).
The Cache Color Table Order SHOULD NOT be sent to the client if it does not support the MemBlt and Mem3Blt Primary Drawing Orders (specified using the Order Capability Set specified in [MS-RDPBCGR] section 2.2.7.1.3).