Set the font color in prawn

Im using prawn to gen开发者_C百科erate a PDF output in a rails app. How do i change the color of the outputted text?

Have you tried fill_color? Code below should work:

require "rubygems"
require "prawn" 

Prawn::Document.generate "hello.pdf" do 
  fill_color "0000ff" 
  text_box "Hello World (in blue)", :at => [200,720], :size => 32 
end

if you use any 1.x version (it's only a pre-release as of writing) you can also use:

Gem install:

$ gem install prawn --pre

Code:

require "rubygems"
require "prawn" 

Prawn::Document.generate "hello.pdf" do 
  text "Hello World (in blue)", :color => "0000ff", :size => 32 
end

Note that you can also set a CMYK color (in this example 100% key black):

fill_color(0,0,0,100)

Use the color option

text "Red color here", color: 'FF0000'

And the result:

With the utmost respect, there is no need to use fill_color as of 2022 because you have to manually set and then unset the color - IMO it's much better to set the color directly via the prawn DSL (domain specific language).