• Size (rectangle)https://placeimg.dev/400x300
  Width x Height in pixels. Example: /400x300 returns a 400x300 SVG.
• Size (square)https://placeimg.dev/400
  Single value for square images. Example: /400 returns a 400x400 SVG.
• Background colorhttps://placeimg.dev/400x300/FF5733
  Hex color for background. Example: /400x300/FF5733 returns a 400x300 SVG with #FF5733 background.
• Gradient backgroundhttps://placeimg.dev/400?gradient=FF5733,4F46E5
  Comma-separated hex colors for a linear gradient. Example: /400?gradient=FF5733,4F46E5
• Texthttps://placeimg.dev/400x300?text=Hello+World
  Centered text. Example: /400x300?text=Hello+World
• Text colorhttps://placeimg.dev/400/222222?text=White+Text&textColor=fff
  Hex color for text. Example: /400/222222?text=White+Text&textColor=fff
• Combined optionshttps://placeimg.dev/400x300/FF5733?text=Hello&textColor=fff
  All options can be combined.