Draw Line in HUD does not respect alpha < 1.0

Draw Line in HUD does not respect alpha < 1.0, instead drawing completely opaque in all circumstances.

Regression (No) issue (does) occur in 4.10.4

1. Open Editor (any project)
2. Create new HUD blueprint
3. In HUD blueprint, create Event Receive Draw HUD
4. From Draw HUD, create Draw Line
5. Set line:

• Start X: 50 Start Y: 75
• End X: 100 End Y: 500

1. Set color to any color with alpha set to .25
2. Compile
3. Set created HUD as HUD in world settings
4. PIE

Results

Line appears on screen at alpha of 1.0

Expected

Line appears on screen with an alpha set to .25. This can be seen as the line is exactly as opaque as with an alpha of 1.0