Pretty much all her singles/albums up to I am.. have a white obi with 浜崎 あゆみ in black, except M which has a slight gold background. From Daybreak to Bold & Delicious, it's ayumi hamasaki with a coloured background, except HEAVEN which is ayumi hamasaki with a white background. From (miss)understood it switches back to 浜崎 あゆみ with white backgrounds, but some releases have the fonts in different colours. (m)u is red font, while A BEST 2 -black- has a black background with white font. All releases starting with MW have white backgrounds with different coloured font (usually matches the colour of the title on the cover). Sunrise/Sunset has a tealish background with white font (first time for a coloured obi with 浜崎 あゆみ)!
I thinkkk that's the most accurate info about the obis
