root@generate-random:~/colors/ruby$ _

Generate Random Colors in Ruby - Hex, RGB & HSL Examples

Complete code tutorial with examples and best practices

Ruby

[ Code Example - Quick Summary ]

Language: Ruby

What: Generate random colors in Ruby using hex, RGB, and HSL formats for Rails applications, web development, and data visualization.

Try it: Use our interactive Colors generator or integrate this code into your Ruby application.

Generate random colors in Ruby using hex, RGB, and HSL formats for Rails applications, web development, and data visualization. Looking for other languages? Check our code examples in PHP , JavaScript , Python , Java , C# , C++ and Go or use our interactive web generator.

Ruby Code Example

# Generate Random Hex Color
def random_hex_color
  "#%06x" % rand(0x1000000)
end

puts "Hex Color: #{random_hex_color}"

# Generate Random RGB Color
def random_rgb_color
  r = rand(256)
  g = rand(256)
  b = rand(256)
  "rgb(#{r}, #{g}, #{b})"
end

puts "RGB Color: #{random_rgb_color}"

# Generate Random HSL Color
def random_hsl_color
  h = rand(361)
  s = rand(101)
  l = rand(101)
  "hsl(#{h}, #{s}%, #{l}%)"
end

puts "HSL Color: #{random_hsl_color}"

# Generate Pastel Color
def random_pastel_color
  h = rand(361)
  s = rand(25..101)
  l = rand(70..91)
  "hsl(#{h}, #{s}%, #{l}%)"
end

puts "Pastel Color: #{random_pastel_color}"

# Generate Color Palette (Array of hex colors)
def generate_color_palette(count)
  count.times.map { random_hex_color }
end

puts "Color Palette: #{generate_color_palette(5).inspect}"

# RGB to Hex Conversion
def rgb_to_hex(r, g, b)
  "#%02x%02x%02x" % [r, g, b]
end

puts "RGB to Hex: #{rgb_to_hex(255, 99, 71)}"

# Generate with SecureRandom (for cryptographic security)
require 'securerandom'

def secure_random_hex_color
  "#" + SecureRandom.hex(3)
end

puts "Secure Hex: #{secure_random_hex_color}"

[EXPLANATION]

Ruby's rand() generates random numbers. For hex colors, use rand(0x1000000) to generate 0-16777215 and format with "%06x" for 6-digit hex. RGB colors use rand(256) for each channel (0-255). HSL uses hue (0-360), saturation (0-100%), and lightness (0-100%). Ruby's range syntax rand(25..101) is inclusive. Use times.map for generating arrays of colors. SecureRandom.hex(3) generates 6 random hex characters (3 bytes) for cryptographically secure colors.

Expected Output

Hex Color: #8a5c9e
RGB Color: rgb(167, 89, 201)
HSL Color: hsl(287, 68%, 59%)
Pastel Color: hsl(156, 72%, 84%)
Color Palette: ["#3d7ea6", "#e85d75", "#ffa600", "#58b368", "#bc5090"]
RGB to Hex: #ff6347
Secure Hex: #7b3f9e