I am using Options Framework to build a list of theme options (using code from the theme, not the plugin).

I have a colour picker as an option, and I can set and call this colour okay.

I'd like to convert the RGB value to HSV, and I found the code to do that here.

I entered this code into my functions.php, in a function called convert_RGA_HSV (on pastebin). It accepts a RGB colour, and returns an array($H, $S, $V).

Also in functions.php I have:

function set_HSV () {
    $varcolour = of_get_option('custom_colour');
    $varhsv = convert_RGA_HSV($varcolour);
    add_option( 'hsv', $varhsv, '', 'yes' );

add_action( 'after_setup_theme', 'set_HSV' );   

of_get_option is the function built into the Options Framework to return a value of an option.

I don't know if this set_HSV function is being run, or if it is not working properly, as no option called hsv is being inserted into theme options.

  • have you enabled debugging to see if any errors are produced? how are you accessing the value of the hsv option in your code?
    – Milo
    Commented Jan 6, 2013 at 7:36
  • Is $varcolour = of_get_option('custom_colour'); actually set before you are trying to retrieve it?
    – Adam
    Commented Jan 6, 2013 at 8:33
  • @userabuser Yes, of_get_option('custom_colour') will already return a value.
    – Steve
    Commented Jan 6, 2013 at 12:34
  • Is your function convert_RGA_HSV accessible to your set_HSV function? Check by dumping the $varhsv variable. If you don't need add_option's extra parameters then its also OK to use update_option which will create the option if it does not exist and or update the option if it already exists. Syntax: update_option( $option, $new_value );
    – Adam
    Commented Jan 6, 2013 at 12:56
  • 1
    @Steve - you didn't say how you were attempting to access the hsv option, of_get_option('hsv') will not work, as it's not part of your array of theme options, you've saved it under its own key so you have to use WordPress' get_option
    – Milo
    Commented Jan 6, 2013 at 17:13

1 Answer 1


When you save an array of data in an option, WordPress serializes it to save, then when you use get_option, it gets unserialized back into the original array, so it can be accessed as you'd access any indexed array without keys in php:

original option added:

$hsv = array('hval','sval','vval');
add_option('hsv', $hsv);

then, to access this data:

$hsv = get_option('hsv');
echo 'h value is ' . $hsv[0];
echo 's value is ' . $hsv[1];
echo 'v value is ' . $hsv[2];

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