From fe6ab048e30cfdec4a627185a027d5dd9e02424a Mon Sep 17 00:00:00 2001
From: chenzecheng <陈泽成@chenzecheng>
Date: Fri, 9 Aug 2024 10:20:56 +0800
Subject: [PATCH] =?UTF-8?q?=E8=AE=A1=E7=AE=97=E8=89=B2=E5=B7=AE=E5=80=BC?=
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---
 .../src/main/java/cn/hutool/core/img/ColorUtil.java        | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/hutool-core/src/main/java/cn/hutool/core/img/ColorUtil.java b/hutool-core/src/main/java/cn/hutool/core/img/ColorUtil.java
index b6cfc6d8d..d78e5ea95 100644
--- a/hutool-core/src/main/java/cn/hutool/core/img/ColorUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/img/ColorUtil.java
@@ -207,6 +207,10 @@ public class ColorUtil {
 	 * @since 6.0.0-M16
 	 */
 	public static int maxDistance(final Color color) {
+		if (null == color) {
+			// (0,0,0)到(256,256,256)的距离约等于442.336
+			return 443;
+		}
 		final int maxX = RGB_COLOR_BOUND - 2 * color.getRed();
 		final int maxY = RGB_COLOR_BOUND - 2 * color.getGreen();
 		final int maxZ = RGB_COLOR_BOUND - 2 * color.getBlue();
@@ -223,7 +227,8 @@ public class ColorUtil {
 	 */
 	public static int computeColorDistance(Color color1, Color color2) {
 		if (null == color1 || null == color2) {
-			return 0;
+			// (0,0,0)到(256,256,256)的距离约等于442.336
+			return 443;
 		}
 		return (int) Math.sqrt(Math.pow(color1.getRed() - color2.getRed(), 2)
 				+ Math.pow(color1.getGreen() - color2.getGreen(), 2)