$20: BG3 palette 0
    Colour 1: Acid highlight (02DFh)
    Colour 2: Acid bubbles (01D7h)
    Colour 3: Acid background (00ACh)

$24: BG3 palette 1

$28: BG3 palette 2
    Colour 1: Mini-map explored room / non-empty energy tank / message box header text / message box A button (48FBh)
    Colour 2: Mini-map explored room feature / non-empty energy tank outline / message box body text (7FFFh)
    Colour 3: Mini-map explored room background / non-empty energy tank background / message box background (0000h)

$2C: BG3 palette 3
    Colour 1: Mini-map unexplored room / HUD text outline / empty reserve auto icon / message box X button / unselected save dialog option (44E5h)
    Colour 2: Mini-map unexplored room feature / HUD text / minimap grid (7FFFh)
    Colour 3: Mini-map unexplored room background / HUD background (0000h)

$30: BG3 palette 4
    Colour 1: Highlighted HUD item background outline (0BB1h)
    Colour 2: Highlighted HUD item background (1EA9h)
    Colour 3: Highlighted HUD item outline (0145h)

$34: BG3 palette 5
    Colour 1: HUD item background outline / empty energy tank outline (3DB3h. 3D46h/3E0Dh in blue/white Ceres)
    Colour 2: HUD item background / empty energy tank (292Eh. 28C1h/2526h in blue/white Ceres)
    Colour 3: HUD item outline / empty energy tank background (1486h. 1420h/0C60h in blue/white Ceres)

$38: BG3 palette 6
    Colour 1: FX primary (palette blend colour 0) / message box Y/L/R/select button / message box Samus' visor (0BB1h)
    Colour 2: FX secondary (palette blend colour 1) / save dialog option select arrow / message box Samus' helmet (001Fh)
    Colour 3: FX background (palette blend colour 2). Used for the blank part of FX3 tilemaps

$3C: BG3 palette 7
    Colour 1: Mini-map room highlight / non-empty reserve auto icon / save dialog text / message box B button / message box Samus suit (02DFh)
    Colour 2: Mini-map room feature highlight / message box Samus suit shading (001Fh. 7FFFh in Crocomire's room)
    Colour 3: Mini-map background / non-empty reserve auto icon background / save dialog background / message box Samus background (0000h)