Yes. The product is designed as a permanent oxidative colourant and the source information specifically describes shade 5.0 Light Brown as suitable for covering greys. The developer helps the colour work on both natural hair and grey strands: colour precursors enter the hair shaft and react inside the cortex to form larger coloured pigments that remain in the hair.
For the most even grey coverage, apply carefully to the areas where grey is most visible, usually the hairline, temples and parting. The cream consistency is useful here because it stays where it is applied and can be placed precisely with a tint brush. If your roots are grey but your lengths are already coloured, a typical approach is to focus first on the root area and only refresh the lengths as directed in the leaflet, so the ends do not become darker than needed.
Grey hair can be more resistant than pigmented hair, so following the package instructions matters: use the supplied developer ratio, apply enough product to fully saturate the roots, and do not shorten or extend the processing time beyond the instructions. Always perform the 48-hour sensitivity test before each application, even if you have used hair colour before.