forge 1.12.2 OBJ files | Green instead of gray

I created obj(Model), mtl(Material), png (Texture) files in Blender.
In blockstate wrote like this:

{
  "forge_marker": 1,
  "defaults": {
    "custom": { "flip-v": true },
    "model": "lg:lofectr_block.obj"
  },
  "variants": {
    "normal": [{}],
    "inventory": [{}]
  }
}

Lofectr_block.mtl:

# Blender MTL File: 'lofectr_block.blend'
# Material Count: 1

newmtl Material
Ns 323.999994
Ka 1.000000 1.000000 1.000000
Kd 0.269303 0.800000 0.181362
Ks 0.500000 0.500000 0.500000
Ke 0.000000 0.000000 0.000000
Ni 1.450000
d 1.000000
illum 2
map_Kd lg:blocks/lofectr_block

Lofectr_block.obj:

# Blender v2.82 (sub 7) OBJ File: 'lofectr_block.blend'
# www.blender.org
mtllib lofectr_block.mtl
o Cube
v 0.500000 0.287963 -0.290945
v 0.500000 -0.500000 -0.500000
v 0.181114 0.500000 0.500000
v 0.500000 -0.500000 0.500000
v -0.500000 0.770715 -0.500000
v -0.500000 -0.500000 -0.500000
v -0.500000 -0.082512 0.500000
v -0.500000 -0.500000 0.500000
vt 0.000000 0.635745
vt 0.320984 0.508432
vt 0.320984 1.000000
vt 0.081898 0.913466
vt 0.665274 0.913219
vt 0.770706 0.511047
vt 0.995901 0.745317
vt 0.995901 0.913219
vt 0.338745 0.511047
vt 0.338745 0.343145
vt 0.669373 0.000000
vt 0.669373 0.511047
vt 1.000000 0.402172
vt 0.669373 0.402172
vt 0.669373 0.000000
vt 1.000000 0.000000
vt 0.338745 0.937867
vt 0.394583 0.623254
vt 0.665274 0.511047
vt 0.665274 0.928530
vt 0.005405 0.508432
vt 0.000000 0.000000
vt 0.338745 0.184662
vt 0.333341 0.508432
vn -0.0958 0.9424 0.3204
vn 0.0000 0.0000 1.0000
vn -1.0000 0.0000 0.0000
vn 0.0000 -1.0000 0.0000
vn 0.9755 0.1558 0.1552
vn 0.1273 0.1002 -0.9868
usemtl Material
s off
f 1/1/1 5/2/1 7/3/1 3/4/1
f 4/5/2 3/6/2 7/7/2 8/8/2
f 8/9/3 7/10/3 5/11/3 6/12/3
f 6/13/4 2/14/4 4/15/4 8/16/4
f 2/17/5 1/18/5 3/19/5 4/20/5
f 6/21/6 5/22/6 1/23/6 2/24/6

Lofectr_block.png:

The problem is that the gray color on the texture in the game turns to green!

Help me, what could be the problem? And how to fix it?