HDR Text on HDR Color Picker can blend into colour and not be visible if pick similar colour

Steps to reproduce:

1. Open a Unity Project
2. Add the attached 'HdrColourPicker.cs' script to the project
3. Add an empty GameObject to the screen via GameObject > Create Empty
4. Drag the HdrColourPicker.cs script onto your new GameObject
5. Select the GameObject
6. Observe that there is the text 'HDR' over the Test Colour color picker
7. Click on the Colour to open the HDR Color Picker
8. Set the colour to a colour that is close or the same as the HDR text (e.g. 58, 58, 58)
9. Observe the Test Colour in the inspector

Actual results: The 'HDR' text is either completely invisible or barely noticeable, as it blends into the picked colour.

Expected results: The 'HDR' text is still visible whatever colour you pick

Reproducible with versions: 6000.0.22f1, 2022.3.48f1, 2021.3.44f1, 7000.0.0a3

Not reproducible with versions: - 

Can’t test with versions: - 

Tested on (OS): Windows 10/11

Notes: -