Change COLOR_ON to be 255 values instead of 1

[jesserockz]

What does this implement/fix?

Changing the COLOR_ON rgb values for greyscale/colour displays

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Configuration change (this will require users to update their yaml configuraiton files to keep working)

Related issue or feature (if applicable): fixes

Pull request in esphome-docs with documentation (if applicable): esphome/esphome-docs#

Test Environment

• ESP32
• ESP8266
• Windows
• Mac OS
• Linux

Example entry for config.yaml:

# Example config.yaml

Explain your changes

COLOR_ON and COLOR_OFF were good when it was only black/white displays, but with color and greyscale displays, the COLOR_ON is only 1/255 color, and could easily be changed to be white like this PR does without breaking uses of it that rely on it.

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in esphome-docs.

[kbx81]

Yeahhhh...I agree, this is how it should be now. I feel like I fixed this in one or two other places but this is really how/where it should be done.