Background color not displaying correctly

[dave0111]

Checklist:

• I updated to the latest version available
• I cleared the cache of my browser

The problem

When selecting Embedded from layout menu, card blends in with HA background;
TPC doesn't pick up correct card background color.

Environment

TPC v: 1.4.0
HA OS: 10.3
HA Core: 2023.6.3

• time-picker-card release with the issue: 1.4.0
• Last working time-picker-card release (if known):
• Browser and Operating System: Chrome/MacOS

Problem-relevant configuration

type: custom:time-picker-card
entity: input_datetime.next_sunset
hour_mode: 24
hour_step: 1
minute_step: 5
layout:
  hour_mode: double
  align_controls: right
  name: header
  embedded: true
hide:
  seconds: true

Javascript errors shown in the web inspector (if applicable):