What needs to be fixed

File location:
layouts/joomla/form/field/color/advanced.php

Line 83 on Joomla 3.10.3 and line 88 on Joomla 4.04 is missing the following field attribute handling:
$required = $required ? ' required aria-required="true"' : '';

Why this should be fixed

Without the fix this is happening:
<input type="text" name="jform[color]" id="jform_color" value="#000000" placeholder="#rrggbb" class="minicolors required hex" data-position="default" data-control="hue"1 data-format="hex"/>

data-control="hue"1, it's applying an integer instead of correct formatting.

How would you fix it

Add the following above $autocomplete as done in other field layout files:
$required = $required ? ' required aria-required="true"' : '';

Result should be:
<input type="text" name="jform[color]" id="jform_color" value="#000000" placeholder="#rrggbb" class="minicolors required hex" data-position="default" data-control="hue" required aria-required="true" data-format="hex"/>

Side Effects expected

As far as I can tell everything should work fine.