//相关依赖
        <dependency>
            <groupId>net.coobird</groupId>
            <artifactId>thumbnailator</artifactId>
            <version>0.4.8</version>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.4.3</version>
        </dependency>
package com.kuang.tryTo;

import cn.hutool.core.img.ImgUtil;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.lang.management.ManagementFactory;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

public class GetColor {

    public static float colorAvgVal = 53.5f;
    //输入一张图片 返回该图片的均值色彩
    public static String  getAvgRGB(URL url){
        BufferedImage bi = ImgUtil.toBufferedImage(ImgUtil.scale(ImgUtil.read(url),0.3f));
        int w = bi.getWidth();
        int h = bi.getHeight();
        float[] dots = new float[]{0.15f, 0.35f, 0.5f, 0.7f, 0.85f};
        int R = 0;
        int G = 0;
        int B = 0;
        for(float dw : dots){
            for(float dh : dots){
                int rgbVal = bi.getRGB((int)(w*dw), (int)(h*dh));
                Color color = ImgUtil.getColor(rgbVal);
                R += color.getRed();
                G += color.getGreen();
                B += color.getBlue();
            }
        }
        int cn = dots.length * dots.length;
        Color color = new Color( R / cn, G / cn, B / cn );

        int r = Math.round(color.getRed()/colorAvgVal);
        int g = Math.round(color.getGreen()/colorAvgVal);
        int b = Math.round(color.getBlue()/colorAvgVal);
        String colorKey = String.format("%s%s%s",r ,g ,b);
        return ColorMap.getColorMap().get( colorKey );
    }

//测试
    public static void main(String[] args) throws MalformedURLException {
        long time =System.currentTimeMillis();
        URL url = new URL( "http://img.bseera.com/p/100000029/100000179/202110141734135293129.jpeg" );

        System.out.println(getAvgRGB(url));
        long endTime=System.currentTimeMillis(); //获取结束时间
        System.out.println(endTime-time);
    }
}
//数据字典
package com.kuang.tryTo;

import java.util.HashMap;
import java.util.Map;

public class ColorMap {
    public static final Map<String, String> colorMaps = new HashMap<>();
    public static final String  colorString = "000 黑色," +
            "011 黑色," +
            "110 黑色," +
            "001 黑色," +
            "100 黑色," +
            "111 黑色," +
            "101 黑色," +
            "010 黑色," +
            "544 浅粉色," +
            "533 粉色," +
            "534 浅粉色," +
            "523 粉色," +
            "535 浅粉色," +
            "524 粉色," +
            "513 深粉色," +
            "525 粉色," +
            "514 深粉色," +
            "503 深粉色," +
            "515 深粉色," +
            "504 深粉色," +
            "554 白色," +
            "555 白色," +
            "545 白色," +
            "222 灰色," +
            "333 灰色," +
            "444 灰色," +
            "200 深红色," +
            "310 深红色," +
            "201 深红色," +
            "300 深红色," +
            "311 深红色," +
            "410 红色," +
            "520 浅红色," +
            "202 深红色," +
            "301 深红色," +
            "400 红色," +
            "411 红色," +
            "510 红色," +
            "312 浅红色," +
            "521 浅红色," +
            "401 红色," +
            "500 红色," +
            "511 红色," +
            "302 浅红色," +
            "412 浅红色," +
            "522 浅红色," +
            "501 红色," +
            "402 浅红色," +
            "512 浅红色," +
            "502 浅红色," +
            "440 浅橙色," +
            "430 深橙色," +
            "441 浅橙色," +
            "420 深橙色," +
            "431 深橙色," +
            "530 橙色," +
            "442 浅橙色," +
            "421 深橙色," +
            "432 深橙色," +
            "531 橙色," +
            "422 深橙色," +
            "532 橙色," +
            "550 黄色," +
            "540 深黄色," +
            "551 黄色," +
            "541 深黄色," +
            "552 浅黄色," +
            "542 深黄色," +
            "553 浅黄色," +
            "543 浅黄色," +
            "130 青色," +
            "230 深青色," +
            "054 青色," +
            "131 青色," +
            "033 深青色," +
            "231 深青色," +
            "055 青色," +
            "132 青色," +
            "154 浅青色," +
            "133 深青色," +
            "232 深青色," +
            "155 浅青色," +
            "233 深青色," +
            "255 浅青色," +
            "355 浅青色," +
            "455 浅青色," +
            "140 青色," +
            "141 青色," +
            "120 深青色," +
            "043 青色," +
            "142 青色," +
            "044 深青色," +
            "121 深青色," +
            "143 深青色," +
            "122 深青色," +
            "144 深青色," +
            "045 青色," +
            "225 深青色," +
            "050 绿色," +
            "150 绿色," +
            "051 绿色," +
            "030 深绿色," +
            "250 绿色," +
            "151 绿色," +
            "052 绿色," +
            "031 深绿色," +
            "251 绿色," +
            "152 绿色," +
            "053 绿色," +
            "350 浅绿色," +
            "032 深绿色," +
            "252 绿色," +
            "153 绿色," +
            "450 浅绿色," +
            "351 浅绿色," +
            "253 绿色," +
            "451 浅绿色," +
            "352 浅绿色," +
            "254 绿色," +
            "452 浅绿色," +
            "353 浅绿色," +
            "453 浅绿色," +
            "354 浅绿色," +
            "454 浅绿色," +
            "040 绿色," +
            "041 绿色," +
            "020 深绿色," +
            "240 绿色," +
            "042 绿色," +
            "340 深绿色," +
            "021 深绿色," +
            "241 绿色," +
            "341 深绿色," +
            "022 深绿色," +
            "242 绿色," +
            "342 深绿色," +
            "243 绿色," +
            "343 深绿色," +
            "012 深蓝色," +
            "034 浅蓝色," +
            "013 深蓝色," +
            "112 深蓝色," +
            "035 浅蓝色," +
            "134 浅蓝色," +
            "113 深蓝色," +
            "014 蓝色," +
            "135 浅蓝色," +
            "234 浅蓝色," +
            "015 蓝色," +
            "114 蓝色," +
            "235 浅蓝色," +
            "115 蓝色," +
            "023 深蓝色," +
            "002 深蓝色," +
            "024 蓝色," +
            "123 蓝色," +
            "244 浅蓝色," +
            "145 浅蓝色," +
            "003 深蓝色," +
            "102 深蓝色," +
            "025 蓝色," +
            "124 蓝色," +
            "344 浅蓝色," +
            "245 浅蓝色," +
            "223 浅蓝色," +
            "103 深蓝色," +
            "004 蓝色," +
            "125 蓝色," +
            "345 浅蓝色," +
            "224 浅蓝色," +
            "005 蓝色," +
            "104 蓝色," +
            "105 蓝色," +
            "212 深紫色," +
            "213 深紫色," +
            "334 浅紫色," +
            "214 深紫色," +
            "313 紫色," +
            "335 浅紫色," +
            "434 浅紫色," +
            "215 深紫色," +
            "314 紫色," +
            "413 紫色," +
            "435 浅紫色," +
            "315 紫色," +
            "414 紫色," +
            "415 紫色," +
            "323 浅紫色," +
            "203 深紫色," +
            "324 浅紫色," +
            "423 浅紫色," +
            "445 浅紫色," +
            "204 深紫色," +
            "303 紫色," +
            "325 浅紫色," +
            "424 浅紫色," +
            "205 深紫色," +
            "304 紫色," +
            "403 紫色," +
            "425 浅紫色," +
            "305 紫色," +
            "404 紫色," +
            "405 紫色," +
            "505 紫色," +
            "220 深棕色," +
            "330 浅棕色," +
            "210 深棕色," +
            "221 深棕色," +
            "320 棕色," +
            "331 浅棕色," +
            "211 深棕色," +
            "321 棕色," +
            "332 浅棕色," +
            "322 棕色," +
            "443 浅棕色," +
            "433 浅棕色 ";

    public static Map<String, String> getColorMap() {
//        String colorString =
//        System.out.println(colorString);

        if (colorMaps.size() == 0) {
            String[] split = colorString.split( "," );
            for (String colorMap : split) {
                String[] codeAndName = colorMap.split( " " );
                colorMaps.put( codeAndName[0],codeAndName[1] );
            }
        }
        return colorMaps;
    }
}

参考链接 https://www.jianshu.com/p/7a639837c84d