Color record for 64 bit floating point images, which allows access to individual color channels.

public TColorHFRec = packed record
  case LongInt of
    0: (A: THalfFloat;
        B: THalfFloat;
        G: THalfFloat;
        R: THalfFloat;);
    1: (Channels: array[0..3] of THalfFloat););
  end;

ImagingTypes (at line 317)