Best way to match non-greys in LR
Easy to do in Photoshop and I'm sorry if that wasn't helpful, but it is the best answer.
In LR you can use the Color Sampler tool on photo #1 and note the RGB values for the sample. Then in photo #2 you can again use the Color Sampler tool and sample the color that you want to convert to the same color in photo #1.
Next adjust color temp and tint (whole photo) or go to the HSL tab and start adjusting Hue values to get the RGB values in the sample photo #2 to to match the RGB values you had for the sample photo #1. If you want to restrict the color change to a specific region on the photo you can take your sample in photo #2 and then use the Adjustment brush to isolate the region you want to change, but in this case you'll be limited to temp and tint to modify the color.