src/anims/FadeThroughColor.tsx

import React, { CSSProperties } from 'react';
import { TransitionImplementationProps } from 'remotion-transition-series/lib/components/Transition';

export const FadeThroughColor: React.FC<
  TransitionImplementationProps & { color: CSSProperties['backgroundColor'] }
> = ({
  color = 'black',
  progress,
  exitingElement = null,
  enteringElement = null,
}) => {
    return (
      <>
        <div
          style={{
            position: 'absolute',
            left: 0,
            top: 0,
            right: 0,
            bottom: 0,
          }}
        >
          {exitingElement}
        </div>
        <div
          style={{
            position: 'absolute',
            left: 0,
            top: 0,
            right: 0,
            bottom: 0,
            backgroundColor: color,
            opacity: Math.min(1, progress * 2),
          }}
        />
        <div
          style={{
            position: 'absolute',
            left: 0,
            top: 0,
            right: 0,
            bottom: 0,
            opacity: Math.max(0, 2 * progress - 1),
          }}
        >
          {enteringElement}
        </div>
      </>
    );
  };