keep-everything-alive/Assets/Scripts/BleachBeach/RecolorOnCollision.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(SpriteRenderer))]
public class RecolorOnCollision : MonoBehaviour
{
    public Color color;

    private SpriteRenderer spriteRenderer;

    void Awake()
    {
        spriteRenderer = GetComponent<SpriteRenderer>();
    }

    void OnTriggerEnter2D(Collider2D other) {
        if(other.tag == "Enemy") {
            spriteRenderer.color = color;
        }
    }
}