With color picker limit the colors available to grayscale

Question

With color picker http://labs.abeautifulsite.net/jquery-miniColors/, how can I limit the number of colors to just using the grayscale slider?

I am not sure I understand. Do you want to force your user to select a shade of gray or to limit the number of lightness levels the user can choose? The former can be done with some CSS, the latter needs a `change` callback. — John Dvorak, Dec 29 '12 at 16:05
as an observation from the one given in the link.. it would seem that 'grayscale' would mean that the RGB would be equal? check this out http://stackoverflow.com/questions/835753/convert-grayscale-value-to-rgb-representation — ianace, Dec 29 '12 at 16:36
Thanks for the reply, My intent is switch to grayscale and take the rgb value — ll.luca, Dec 30 '12 at 13:54

score 0 · Answer 1 · answered Apr 21 '16 at 02:01

In order to limit to greyscale values, the rgb model must be like:

x = [0, 255]

rgb(x, x, x)

For example:

.elem { background-color: rgb(122, 122, 122); }

or in hexadecimal, as css # notation, the values must follow:

x = [0, 9][a, f]
y = [0, 9][a, f]

#xyxyxy

For example:

.elem { background-color: #e1e1e1; }

1 Answers1