The user wants me to produce the exact Home Assistant service calls needed to set three WLED light entities to blue (RGB 0,0,255).

From the context:
- Entity 1: `light.wled` - currently on
- Entity 2: `light.wled_2` - currently on  
- Entity 3: `light.wled_3` - currently on

All are WLED-derived RGB lights.

For Home Assistant, the service call to turn on a light with specific color is:
```yaml
service: light.turn_on
target:
  entity_id: <entity_id>
data:
  rgb_color: [0, 0, 255]
```

I need to create three separate service calls (one for each entity) or could potentially batch them. The most straightforward approach is individual calls since they're different entities.

Let me produce the exact YAML/service call format needed.
## Diagnosis: Home Assistant WLED LED Color Change

**Goal:** Set all 3 WLED light entities to solid blue (RGB `[0, 0, 255]`).

### Required Service Calls

Each entity requires an individual `light.turn_on` service call with the `rgb_color` parameter. Execute these three calls:

```yaml
# Light 1 - wled
service: light.turn_on
target:
  entity_id: light.wled
data:
  rgb_color: [0, 0, 255]

# Light 2 - wled_2
service: light.turn_on
target:
  entity_id: light.wled_2
data:
  rgb_color: [0, 0, 255]

# Light 3 - wled_3
service: light.turn_on
target:
  entity_id: light.wled_3
data:
  rgb_color: [0, 0, 255]
```

### Alternative: Single Call with Multiple Targets (if supported)

If your Home Assistant version supports multiple targets in one call:

```yaml
service: light.turn_on
target:
  entity_ids:
    - light.wled
    - light.wled_2
    - light.wled_3
data:
  rgb_color: [0, 0, 255]
```

### Verification

After execution, verify via Home Assistant Developer Tools → Services → `light.turn_on` or check the state of each entity to confirm RGB values are set to `[0, 0, 255]`.