Brand Guidelines 完整指南

def select_text_color(background_color):
    """
    根据背景色选择最佳文字颜色
    
    背景亮度 > 128 → 使用深色文字
    背景亮度 ≤ 128 → 使用浅色文字
    """
    # 计算亮度 (简化公式)
    brightness = (bg.r * 299 + bg.g * 587 + bg.b * 114) / 1000
    
    if brightness > 128:
        return DARK  # #141413
    else:
        return LIGHT  # #faf9f5

ACCENT_COLORS = [ORANGE, BLUE, GREEN]

def apply_shape_colors(shapes):
    """
    为非文字图形应用强调色
    轮流使用橙/蓝/绿以保持视觉兴趣
    """
    for i, shape in enumerate(shapes):
        if not is_text_shape(shape):
            color = ACCENT_COLORS[i % 3]
            shape.fill.solid()
            shape.fill.fore_color.rgb = color

FONT_FALLBACK = {
    'headings': ['Poppins', 'Arial', 'Helvetica', 'sans-serif'],
    'body': ['Lora', 'Georgia', 'Times New Roman', 'serif']
}

def apply_font(text_frame, is_heading):
    """
    应用字体，支持自动回退
    """
    font_family = FONT_FALLBACK['headings' if is_heading else 'body']
    
    for font in font_family:
        if is_font_available(font):
            text_frame.font.name = font
            break

from pptx.util import RGBColor
from pptx.enum.text import PP_ALIGN

# 定义品牌色彩
BRAND_COLORS = {
    'dark': RGBColor(20, 20, 19),
    'light': RGBColor(250, 249, 245),
    'mid_gray': RGBColor(176, 174, 165),
    'light_gray': RGBColor(232, 230, 220),
    'orange': RGBColor(217, 119, 87),
    'blue': RGBColor(106, 155, 204),
    'green': RGBColor(120, 140, 93)
}

# 应用到文字
paragraph.font.color.rgb = BRAND_COLORS['dark']

# 应用到形状填充
shape.fill.solid()
shape.fill.fore_color.rgb = BRAND_COLORS['orange']

# 应用到形状轮廓
shape.line.color.rgb = BRAND_COLORS['dark']
shape.line.width = Pt(2)

from pptx.util import Pt

def apply_brand_fonts(presentation):
    """
    为整个演示文稿应用品牌字体
    """
    for slide in presentation.slides:
        for shape in slide.shapes:
            if not shape.has_text_frame:
                continue
                
            for paragraph in shape.text_frame.paragraphs:
                # 判断是否为标题
                is_heading = paragraph.font.size >= Pt(24)
                
                # 应用字体
                if is_heading:
                    paragraph.font.name = 'Poppins'
                else:
                    paragraph.font.name = 'Lora'

from pptx import Presentation

# 加载演示文稿
prs = Presentation('original.pptx')

# 应用品牌色彩
for slide in prs.slides:
    # 设置背景
    background = slide.background
    fill = background.fill
    fill.solid()
    fill.fore_color.rgb = BRAND_COLORS['light']
    
    # 处理所有形状
    for shape in slide.shapes:
        if shape.has_text_frame:
            # 应用文字色彩
            for paragraph in shape.text_frame.paragraphs:
                paragraph.font.color.rgb = BRAND_COLORS['dark']
                
                # 应用字体
                if paragraph.font.size >= Pt(24):
                    paragraph.font.name = 'Poppins'
                else:
                    paragraph.font.name = 'Lora'
        else:
            # 应用强调色到图形
            if shape.shape_type == MSO_SHAPE.RECTANGLE:
                shape.fill.solid()
                shape.fill.fore_color.rgb = BRAND_COLORS['orange']

# 保存
prs.save('branded.pptx')

import matplotlib.pyplot as plt

# 使用品牌色彩
plt.style.use('seaborn-v0_8-whitegrid')

fig, ax = plt.subplots(figsize=(10, 6))

# 设置背景色
fig.patch.set_facecolor('#faf9f5')
ax.set_facecolor('#faf9f5')

# 绘制数据（使用品牌强调色）
ax.plot(x, y1, color='#d97757', linewidth=3, label='产品 A')
ax.plot(x, y2, color='#6a9bcc', linewidth=3, label='产品 B')
ax.plot(x, y3, color='#788c5d', linewidth=3, label='产品 C')

# 设置文字色彩和字体
ax.set_xlabel('时间', fontsize=14, color='#141413', fontfamily='Poppins')
ax.set_ylabel('销量', fontsize=14, color='#141413', fontfamily='Poppins')
ax.set_title('季度销售趋势', fontsize=20, color='#141413', 
             fontfamily='Poppins', weight='semibold')

# 设置图例
ax.legend(facecolor='#e8e6dc', edgecolor='#b0aea5')

# 网格线
ax.grid(color='#e8e6dc', linestyle='-', linewidth=0.5)

plt.savefig('branded_chart.png', dpi=300, facecolor='#faf9f5')