Not a true finch, but actually a tanager. This is an immature or female. In Southern South America the females are very different from the brightly colored males being dull brown and streaked. The two populations are widely separated and it has been suggested that more than one species may be involved. This species was introduced on Oahu and Hawaii Is (the big island) in the 1960s. Canon PowerShot SX60 HS.
References:
Pratt, H.D., Bruner, P., and Berrett, D.G. (1987) A Field Guide to the Birds of Hawaii and the Tropical Pacific. Princeton University Press.
Pyle, R.L., and P. Pyle. 2017. The Birds of the Hawaiian Islands: Occurrence, History, Distribution, and Status. B.P. Bishop Museum, Honolulu, HI, U.S.A. Version 2 (1 January 2017) http://hbs.bishopmuseum.org/birds/rlp-monograph/
Rising, J. & Jaramillo, A. (2020). Saffron Finch (Sicalis flaveola). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/62084 on 6 February 2020).
Saffron Finch (Sicalis flaveola), In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. retrieved from Neotropical Birds Online: https://neotropical.birds.cornell.edu/Species-Account/nb/species/saffin.