Basic component separator has invalid CSS style

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.2.X, Master
• Fix Version/s: 7.2.10 DXP FP5, 7.2.10.2 DXP SP2, 7.2.X, 7.3.10 DXP GA1, Master
• Component/s: Fragment Administration
• Labels:
  • ee-ts
  • liferay-dxp-72-sp2
  • liferay-fixpack-dxp-5-7210
• Branch Version/s:
  7.2.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/pavel-savinov/liferay-portal/pull/560

DESCRIPTION
The Separator component contains improper CSS styling when a color has not been set for the component (see screenshot).

STEPS TO REPRODUCE
1. Add a content type page.
2. Add Separator component.
3. Inspect component through browser dev tool.

EXPECTED RESULTS
Border-color should not exist as no color has been set for the component (see PTR-1597).

ACTUAL RESULTS
Border-color exists and has no value (see screenshot).

NOTE
The issue only occurs when the color has not been set for the component.
This issue also occurs in other fragment components that use color palettes (in particular, the Heading and Paragraph components). 

BRANCH
Reproduced
05fcd5646a92c309a33f8acc83b86b09ce56a608

MASTER
Reproduced
7b98b93ec66edc3e8ef801e628e43f69c136afea