### ImageMagick version

7.1.1-2

### Operating system

Linux

### Operating system, version and so on

Linux x86_64 6.2.5-zen1-1-zen

### Description

Upon trying to convert my JXL image to a PNG with `convert` (the JXL image was re-encoded from a 16-bit PNG exported from Darktable) it will cause the output image to be discolored.

This happens on a number of Darktable output images I have, which is a big problem.


### Steps to Reproduce

1. Download `smalltest_source` linked below
2. Reencode with *any version* of `cjxl`
3. run `convert output.jxl output.png`
4. Observe discolored PNG. You may open in a web browser like Firefox to see the behavior I'm talking about.

### Images

![smalltest_source](https://user-images.githubusercontent.com/35711760/224607920-ca04044d-cf02-49cf-80c3-115eb1d95d71.png)
[smalltest (jxl).zip](https://github.com/ImageMagick/ImageMagick/files/10953565/smalltest.jxl.zip)
![convert_output](https://user-images.githubusercontent.com/35711760/224608314-81853436-98e2-4f2f-a163-7fa6621ec277.png)
Converting Specific JXL -> PNG with convert Breaks Colors
This is a GitHub Issue
repo:ImageMagick
owner:ImageMagick
Title : Converting Specific JXL -> PNG with convert Breaks Colors
Issue date:

--- start body ---
### ImageMagick version

7.1.1-2

### Operating system

Linux

### Operating system, version and so on

Linux x86_64 6.2.5-zen1-1-zen

### Description

Upon trying to convert my JXL image to a PNG with `convert` (the JXL image was re-encoded from a 16-bit PNG exported from Darktable) it will cause the output image to be discolored.

This happens on a number of Darktable output images I have, which is a big problem.


### Steps to Reproduce

1. Download `smalltest_source` linked below
2. Reencode with *any version* of `cjxl`
3. run `convert output.jxl output.png`
4. Observe discolored PNG. You may open in a web browser like Firefox to see the behavior I'm talking about.

### Images

![smalltest_source](https://user-images.githubusercontent.com/35711760/224607920-ca04044d-cf02-49cf-80c3-115eb1d95d71.png)
[smalltest (jxl).zip](https://github.com/ImageMagick/ImageMagick/files/10953565/smalltest.jxl.zip)
![convert_output](https://user-images.githubusercontent.com/35711760/224608314-81853436-98e2-4f2f-a163-7fa6621ec277.png)
--- end body ---
