Kim Kardashian wants to co-ordinate her outfits with Kanye West and their daughter.

The 'Keeping Up with the Kardashians' star is ''obsessed'' with a friend of hers who came to 12-month-old daughter North's recent birthday party wearing clothes in the same colour as the rest of the family, so now the brunette beauty thinks it is definitely something she wants to try, especially if she and her spouse have more kids.

She said: ''You know what I'm obsessed with? This family came to North's birthday party and they were all wearing white. There were three kids, a mom and a dad, and they were all wearing different white separates - harem pants, flowy blouses, very boho.

''If I have more kids, we're all going to go out in the same colour. All nude, all black - it's going to be our thing.''

The 33-year-old beauty also admitted she envies how glamorous her sister Kourtney - who is expecting her and Scott Disick's third child - looks when she is pregnant as she doesn't think she was ''hot'' when carrying North.

She told Lucky magazine: ''Kourtney has the best maternity style. I mean, I wish I'd looked like a hot pregnant person...''

However, Kim admits finding a good pair of maternity jeans gave her a confidence boost.

She added: ''Maternity jeans -- the ones from J Brand -- changed my life. They made me feel like a normal person again!''