Can I convert RAL colour into another RAL?

No, it is not possible to convert a RAL colour into a RAL colour from a different range.

The three different product lines RAL Classic, RAL Effect and RAL Design are completely separate ranges and independent from each other. The ranges were formulated for different purposes. RAL Design codes are nine digit numbers which relate to LCH colour space, 1825 colours for interiors and architecture. Whereas the RAL Classic range only has 216 colours for exterior paint and metal power coat.

To find the closest RAL colour use a RAL Color Reader to measure your colour target.