Get the most dominant color in the member's profile picture and set it as the embed color so it fits with the image.

main.py

from discord.ext import commands
import binascii
from PIL import Image
from io import BytesIO
import numpy as np
import scipy.cluster

bot = commands.Bot(command_prefix="!")

@bot.command()
async def test(ctx):

    NUM_CLUSTERS = 5

    data = await ctx.author.avatar_url_as().read()
    stream = BytesIO(data)
    im = Image.open(stream)
    ar = np.asarray(im)
    shape = ar.shape
    ar = ar.reshape(scipy.product(shape[:2]), shape[2]).astype(float)

    codes, dist = scipy.cluster.vq.kmeans(ar, NUM_CLUSTERS)

    vecs, dist = scipy.cluster.vq.vq(ar, codes)  # assign codes
    counts, bins = scipy.histogram(vecs, len(codes))  # count occurrences

    index_max = scipy.argmax(counts)  # find most frequent
    peak = codes[index_max]
    colour = binascii.hexlify(bytearray(int(c) for c in peak)).decode('ascii')

    embed = discord.Embed(title=ctx.author.name, description="Info here probably", color=int(colour, 16))
    embed.set_thumbnail(url=ctx.author.avatar_url)
    await ctx.send(embed=embed)

bot.run("TOKEN duh")