Temprarily set a color to be used for Gizmos and Handles.

GizmosColor.cs

using UnityEngine;
using System;

/// <summary>
/// Temporarily set a color to be used for Gizmos.
/// <example>
/// <code>
/// using (new GizmosColor(Color.red))
/// {
///   Gizmos.DrawSphere(transform.position, 1f);
/// }
/// </code>
/// </example>
/// </summary>
public struct GizmosColor : IDisposable
{
    private Color colorBefore;

    public GizmosColor(Color color)
    {
        colorBefore = Gizmos.color;
        Gizmos.color = color;
    }

    public void Dispose()
    {
        Gizmos.color = colorBefore;
    }
}

HandlesColor.cs

using UnityEngine;
using UnityEditor;
using System;

/// <summary>
/// Temporarily set a color to be used for Handles.
/// <example>
/// <code>
/// using (new HandlesColor(Color.red))
/// {
///   Handles.Label(transform.position, gameObject.name);
/// }
/// </code>
/// </example>
/// </summary>
public struct HandlesColor : IDisposable
{
    private Color colorBefore;

    public HandlesColor(Color color)
    {
        colorBefore = Handles.color;
        Handles.color = color;
    }

    public void Dispose()
    {
        Handles.color = colorBefore;
    }
}