Bug Report: Inconsistent Volume Bar Border Colors Between v0.12.9b7 and v0.12.10b0 When Using make_marketcolors

Comienza ejecutando el código de prueba mínimo con mplfinance v0.12.9b7 y v0.12.10b0, centrándote en make_marketcolors, make_mpf_style y mpf.plot con el volumen habilitado. Traza cómo los colores de volumen invertidos llegan a las barras de volumen y compara los bordes renderizados. Se considera terminado cuando la versión más reciente produce colores de borde coherentes en las barras de volumen con los colores de mercado solicitados.

Description
When changing the volume colors using make_marketcolors, the results differ between versions v0.12.9b7 and v0.12.10b0. The older version looks fine, but in the newer version, the border color of the volume bars appears inconsistent.

Minimal Test Code

import mplfinance as mpf
import pandas as pd

# Sample data
dates = pd.date_range('2023-01-01', periods=10)
data = {
    'Open': [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
    'High': [2, 3, 4, 5, 6, 7, 8, 9, 10, 11],
    'Low': [0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5],
    'Close': [2, 1, 4, 3, 6, 5, 8, 7, 10, 9],
    'Volume': [100, 200, 300, 400, 500, 600, 700, 800, 900, 1000]
}
df = pd.DataFrame(data, index=dates)

# Get the 'yahoo' style
yahoo_style = mpf.make_mpf_style(base_mpf_style='yahoo')

# Access the 'yahoo' style market colors
yahoo_market_colors = yahoo_style['marketcolors']

# Reverse the colors
reversed_market_colors = mpf.make_marketcolors(
    up=yahoo_market_colors['candle']['down'],
    down=yahoo_market_colors['candle']['up'],
    edge={'up': yahoo_market_colors['edge']['down'], 'down': yahoo_market_colors['edge']['up']},
    wick={'up': yahoo_market_colors['wick']['down'], 'down': yahoo_market_colors['wick']['up']},
    ohlc={'up': yahoo_market_colors['ohlc']['down'], 'down': yahoo_market_colors['ohlc']['up']},
    volume={'up': yahoo_market_colors['volume']['down'], 'down': yahoo_market_colors['volume']['up']}
)

# Define a new style with reversed colors
reversed_style = mpf.make_mpf_style(base_mpf_style='yahoo', marketcolors=reversed_market_colors)

# Plot the candlestick chart
mpf.plot(df, type='candle', volume=True, style=reversed_style)

Screenshots
v0.12.9b7 (looks fine):

v0.12.10b0 (the border color of the volume bars appears inconsistent):