[dev-context] Light colors in colo-imp-rgb.mkiv

Aditya Mahajan adityam at umich.edu
Mon Jun 8 22:09:10 CEST 2020

On Mon, 8 Jun 2020, Hans Hagen wrote:

> On 6/8/2020 7:36 AM, Aditya Mahajan wrote:
>> Hi,
>> The 'light' colors defined in colo-imp-rgb.mkiv are not light!
>> \definecolor [lightred]      [r=1,   g=0,   b=0]
>> \definecolor [lightgreen]    [r=0,   g=1,   b=0]
>> \definecolor [lightblue]     [r=0,   g=0,   b=1]
>> \definecolor [lightcyan]     [r=0,   g=1,   b=1]
>> \definecolor [lightmagenta]  [r=1,   g=0,   b=1]
>> \definecolor [lightyellow]   [r=1,   g=1,   b=0]
> hm, a compatibility thing
>> Is this intentional? How about replacing them with somewhat reasonable 
>> defaults?
>> \definecolor [lightred]      [r=1,    g=0.5, b=0.5]
>> \definecolor [lightgreen]    [r=0.5,  g=1,   b=0.5]
>> \definecolor [lightblue]     [r=0.75, g=1,   b=1]
>> \definecolor [lightcyan]     [r=0.5,  g=1,   b=1]
>> \definecolor [lightmagenta]  [r=1,    g=0.5, b=1]
>> \definecolor [lightyellow]   [r=1,    g=1,   b=0.5]
>> See attached output. These are not the ideal choices in terms of shades, 
>> but I have chosen values which are least subjective and still give 
>> reasonable shades.
> your blue is kind of weird ..

0.5(blue,white) does look like light blue to it, but it is better than 1.0(blue) :-)

> this is the metapostisch way:
> \definecolor [lightred]      [.5(red,white)]
> \definecolor [lightgreen]    [.5(green,white)]
> \definecolor [lightblue]     [.5(blue,white)]
> \definecolor [lightcyan]     [.5(cyan,white)]
> \definecolor [lightmagenta]  [.5(magenta,white)]
> \definecolor [lightyellow]   [.5(yellow,white)]
> which i bet you prefer

Much nicer.


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