You are modifying an existing D3 + React cell rendering implementation.

CRITICAL RULE: You are ONLY allowed to change the TEXT COLOR behavior and ONLY for cells that have anomaly data.

You must NOT change:

• Gradients
• Blur filters
• Border stroke
• Glow logic
• Layer order
• Animation timing constants
• Easing functions
• Opacity animation
• SVG structure
• D3 transition chaining
• Rendering logic for non-anomaly cells
• Any existing visual colors

==================================================== GOAL

For anomaly cells only:

When blink cycle runs:

1. During ACTIVE state: Text color must be pure black (#000000)

2. During FADE_OUT: Text color must smoothly transition toward white

3. During CLEAR state: Text color must be pure white (#FFFFFF)

4. During FADE_IN: Text color must transition back toward black

This loop must continue indefinitely in sync with the existing blink animation.

==================================================== STRICT CONDITIONS

• Non-anomaly cells must behave EXACTLY as before.
• Do NOT animate text color for non-anomaly cells.
• Use D3 transitions (not CSS).
• Use the SAME timing constants: ACTIVE_HOLD FADE_OUT CLEAR_HOLD FADE_IN
• Use the SAME easing functions: FADE_OUT_EASE FADE_IN_EASE
• Keep recursive blinkCycle() structure intact.
• Do NOT simplify transition chaining.
• Do NOT modify opacity transitions.
• Do NOT alter gradient stops.
• Do NOT alter blur stdDeviation.
• Do NOT refactor the component.
• Do NOT move logic outside current useEffect.

==================================================== IMPLEMENTATION STRATEGY

1. Detect anomaly condition (assume boolean isAnomaly).
2. Capture text selection in a variable.
3. Inside blinkCycle:
   • Chain color transitions alongside opacity transitions.
4. Use d3.interpolateRgb("#000000", "#FFFFFF").
5. Ensure transitions are synchronized with opacity durations.
6. Ensure non-anomaly cells skip color animation entirely.

==================================================== OUTPUT FORMAT

Return:

1. Short explanation of what was added.
2. Only modified code sections.
3. Clearly mark additions.
4. Do NOT rewrite unrelated code.