Baby rice is a bit of a pointless exercise IMO. If your baby is old enough for BLW, then there is very little point in spooning in baby rice of any colour. I have never seen brown baby rice. I think they have to add all the nutrients anyway - it is basically wallpaper paste with a few added vitamins.
If you want to do spooning and your baby is below 6 months, you might want to look at the plum baby porridge for that age range (it tasted nice!). I did BLW but had a free sample of the porridge and found it to be yummy. I thickened it and gave the spoon to DD (she was 6 months) and she agreed! DS started with purees because he was prem but went onto 'BLW' (of a type, since he didn't start that way so not true BLW really). DD was a natural and I never needded to spoonfeed her anything. She's now 21 months and a great eater. DS is 4.5 and also eats well and always has. Neither liked babyrice one bit though .