Okay just for clarification:
Texts for everything are in menu_msbt_LZ.bin
They can be edited with the MSBT Editor Reloaded, however not everything shows up in there. I personally prefer a Hex Editor.
The power off screen colors are in sleep_LZ.bin
The used colors go by #464646 (Background), #3C3C3C (Border/Glow) for the Screens and #23232D for the Lines. [P_Bg_D_00]
Button Font color is #323232. [T_BtnF_01]
Icons in the normal home menu are in hud_LZ.bin
Playcoin color for example is #B4B400. [P_Coin_00]
Notes:
Default Font color is #323232 everywhere.
Default glow/border color is default white #FFFFFF everywhere.
I use a Hex editor to change the colors. (The replace function is great)