I just saved your image and loaded it into GIMP, and the correct value for the brownish color shown as selected is RGB(256): 78,66,39. (decimal)
The same value for both the selection in the read square, and the one left of the RGBA value that is wrong.
Brown and yellow colors are dominated by red and green, the RGB value shown in your picture can’t possibly match the color shown as the selected color.
I just saved your image and loaded it into GIMP, and the correct value for the brownish color shown as selected is RGB(256): 78,66,39. (decimal) The same value for both the selection in the read square, and the one left of the RGBA value that is wrong. Brown and yellow colors are dominated by red and green, the RGB value shown in your picture can’t possibly match the color shown as the selected color.
The value shown in your software is wrong.