How to change the color of individual bars in histplot

I was looking on internet but i didn't get any solution.

I have this graph and I want to change the color of the first bar, if I use the parameter 'color' it changes all the bars.

Is it possible to do this?

You could access the list of generated rectangles via ax.patches, and then recolor the first one:

import matplotlib.pyplot as plt
import seaborn as sns
import pandas as pd
import numpy as np

df = pd.DataFrame({'Sales': 100000 * (np.random.rand(80) ** 1.5) + 18000})
ax = sns.histplot(x='Sales', data=df, bins=4, color='skyblue', alpha=1)
ax.patches[0].set_facecolor('salmon')
plt.show()

To get a separation exactly at 40.000, you could create two histograms on the same subplot. With binrange= exact limits can be set:

import matplotlib.pyplot as plt
import seaborn as sns
import pandas as pd
import numpy as np

df = pd.DataFrame({'Sales': 100000 * (np.random.rand(80) ** 1.5) + 18000})
# either choose a fixed limit, or set it exactly at one fourth
limit = 40000
# limit = df['Sales'].min() + 0.25 * (df['Sales'].max() - df['Sales'].min())
ax = sns.histplot(x='Sales', data=df[df['Sales'] <= limit],
                  bins=1, binrange=(df['Sales'].min(), limit), color='salmon')
sns.histplot(x='Sales', data=df[df['Sales'] > limit],
             bins=3, binrange=(limit, df['Sales'].max()), color='skyblue', ax=ax)
plt.show()