Pseudophilautus hoffmanni
—
Hoffman’s Shrub Frog

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
Some individuals are indeed mostly brown, but I only saw ones in less standard colors and/or with interesting highlights like this.
Online references:
- Pseudophilautus hoffmanni account on AmphibiaWeb
- Pseudophilautus hoffmanni account on the Lanka Nature Summary blog
- Pseudophilautus hoffmanni account on iNaturalist
- Pseudophilautus hoffmanni account on Amphibian Species of the World
- Rhacophoridae overview on Amphibians of Sri Lanka