Stripes style giving me hassle

Can’t figure this one out.
Getting an error using Stripes, most likely because there’s an AlphaL color in it.
However, adding a Black underlying base color, the usual quick-fix for a base layer containing a transparent color, is not working.
I feel like this has worked fine before, considering I copied the blade style out of an old config.
This way:

    StylePtr<Layers<
  // Black,
    Stripes<6000,-1000,Red,Black,AlphaL<White,Int<16000>>>,
    InOutTrL<TrWipe<400>,TrWipeIn<400>>
  >>(),

gives expected error:

ProffieOS/styles/stripes.h:42:22: error: conversion from 'RGBA_um_nod' to non-scalar type 'OverDriveColor' requested

But adding in the black layer doesn’t fix it.

    StylePtr<Layers<
    Black,
    Stripes<6000,-1000,Red,Black,AlphaL<White,Int<16000>>>,
    InOutTrL<TrWipe<400>,TrWipeIn<400>>
  >>(),

The error is more extensive

ProffieOS/styles/layers.h:41:58: error: ambiguous overload for 'operator<<' (operand types are 'SimpleColor' and 'SimpleColor')
   41 |   auto getColor(int led) -> decltype(base_.getColor(led) << layer_.getColor(led)) {
In file included from ProffieOS/ProffieOS.ino:443:
ProffieOS/common/color.h:553:20: note: candidate: 'SimpleColor operator<<(const SimpleColor&, const RGBA_um_nod&)'
  553 | inline SimpleColor operator<<(const SimpleColor& base, const RGBA_um_nod& over) {

-----repeating for a bunch of lines, then a bunch of: 
ProffieOS/common/color.h:656:3: note: in expansion of macro 'DISAMBIGUATE_OVER'
  656 |   DISAMBIGUATE_OVER(OverDriveColor, A)  \
      |   ^~~~~~~~~~~~~~~~~
ProffieOS/common/color.h:660:1: note: in expansion of macro 'DISAMBIGUATE_OVER2'
  660 | DISAMBIGUATE_OVER2(RGBA_um)
      | ^~~~~~~~~~~~~~~~~~
ProffieOS/common/color.h:653:15: note: candidate: 'OverDriveColor operator<<(const OverDriveColor&, const RGBA_um_nod&)'
  653 |   inline auto operator<<(const A & base, const B##_nod & over) ->decltype(base << B(over)) { return base << B(over); }
      |               ^~~~~~~~

---------- repeating -----------

Did I break it?

Stripes doesn’t support transparent colors.

Stripes cannot have layers inside the style and cannot use AlphaL as a Color.

oh yeah. :man_facepalming:
I thought I had it in a previous config, but I had actually just glazed over the Stripes closing > and assumed the AlphaL color that followed was a color of Stripes.
Nothing to see here, moving on.
Sorry, thanks.