As you can see at the top of this answer, the [color] Scenes (Black Scene, Red Scene, etc.) in the Monogatari series all include a parenthesized number beneath the romanized form of the name of the color shown.
Here's a list of them:
ROMANIZED GLOSS NUMBER KANJI(READING)
aka "red" (135) 赤 (あか)
kuro "black" (629) 黒 (くろ)
shiro "white" (4646) 白 (しろ)
ki "yellow" (0303) 黄 (き)
ouchi "lilac" (349) 楝 (おうち)
ao "blue" (014) 青 (あお)
momo "peach" (372) 桃 (もも)
moegi "light green" (469) 萌黄(もえぎ)
murasaki "purple" (039) 紫 (むらさき)
Question: What do the numbers mean?
Possibilities:
- Something to do with color codes (but this is unlikely because neither "white" nor "black" seems to have a special number)
- Some sort of character code for either the kanji, the kana reading, or the romanized form (though I haven't come up with anything for this)
- It's all a clever ruse by Shinbo to confuse us
- ???