Testing

[lloydy]

I can't get the font colour to work when I post pictures in the Our Pictures topic.

but it kinda works here.....

I've got green

and some blue. 

anf finally red, but it's not working as it should. Or as I think it did. which is probably more like it. 

[Randy]

I'm color blind.

[daveh]

One of the problems with text colours is that the post boxes are set with alternating colours. A colour that looks good in one sometimes almost disappears into oblivion in the other. Other than that I can't say I've noticed the problem of the visual not matching the selected; but that is possibly because I don't often select coloured text, so here goes.

RED
GREEN
BLUE
YELLOW
PINKISH
BROWN TINGE
VIOLET

They appear AOK on preview (royal blue background). Now if I can just find out how to get back to normal coloured* text, I'll be quids in.


* Strictly, of course, white is not a colour - on the other hand the normal text isn't quite white (and it changed back to violet on its own volition).

Oh, well back to the drawing board, or should that be palette?

[daveh]

Jan 29, 2014 19:05:20 GMT -5 lloydy said:

I can't get the font colour to work when I post pictures in the Our Pictures topic.

but it kinda works here.....

I've got green

and some blue. 

anf finally red, but it's not working as it should. Or as I think it did. which is probably more like it. 

As a second thought, Lloydy, I'll quote your entry to see how its colours stack up.

[mickeyobe]

Jan 31, 2014 2:29:35 GMT -5 daveh said:

One of the problems with text colours is that the post boxes are set with alternating colours. A colour that looks good in one sometimes almost disappears into oblivion in the other. Other than that I can't say I've noticed the problem of the visual not matching the selected; but that is possibly because I don't often select coloured text, so here goes.

RED
GREEN
BLUE
YELLOW
PINKISH
BROWN TINGE
VIOLET

They appear AOK on preview (royal blue background). Now if I can just find out how to get back to normal coloured* text, I'll be quids in.


* Strictly, of course, white is not a colour - on the other hand the normal text isn't quite white (and it changed back to violet on its own volition).

Oh, well back to the drawing board, or should that be palette?

Dave,

Strictly speaking white is a combination of all colours. Black is the absence of colour.

By the way, your choice of purple as well as the dark blue against the dark grey background of this letter is almost impossible to read. Or is it me?

Mickey

[daveh]

Mickey, I presume it depends what the computer/programme colour scheme is set. My two backgrounds seem to be dark blue and dark brown - on both the iPad and the desktop. That said, I'm perfectly willing to believe the brown is in fact grey. My car is grey, but if you ask anyone they will say it's something like a champagne colour.

Addendum: my forum theme is set to blue colours

[mickeyobe]

Jan 31, 2014 9:15:34 GMT -5 daveh said:

Mickey, I presume it depends what the computer/programme colour scheme is set. My two backgrounds seem to be dark blue and dark brown - on both the iPad and the desktop. That said, I'm perfectly willing to believe the brown is in fact grey. My car is grey, but if you ask anyone they will say it's something like a champagne colour.

Addendum: my forum theme is set to blue colours

Dave,

I suppose this could be a futile discussion without end.

I sometimes wonder if what I see as a certain colour is perceived by someone else the same way.

I think it has usually been accepted that there are two sets of primary colours from either of which all other colours can be made.
Pigment primaries are red, blue and yellow.
Primaries for light are cyan, magenta and yellow.
Then Edwin Land went ahead and proved that all colours could be created with only red and green.

I wonder what amazing revelation Marcus Chow, my next door neighbour's new baby, will provide the world in the future.

I could go on espousing my pigmented point of view but some rebel will, undoubtedly, prove me wrong someday.

Mickey

[Stephen]

Quote "Then Edwin Land went ahead and proved that all colours could be created with only red and green".

Which helps towards an understanding of the appalling colour on some Polaroid shots!.....

He shared the theory with Dr Kalmus of Technicolor fame, who, for the first few years of the process of movie colour in the 1920's, struggled with a two colour system, red/green, that gave murky blues, which it on the scientific basis of Maxwell's understanding of three colour theory ..it simply should not.

A rival 1920's/30 movie colour process was Multicolor, that used red/blue filters, but managed green as well, again no complete explanation for the impossible colour.

Dr Kalmus and all other colour processes jumped in the 1930's to using three filters, red/blue/green, or the complementary colours, and it worked fine for Kodak and Agfa,  and still is the basis of the way that most digital cameras handle colour, in three channels.

But it all left Dr Edwin Land a bit bemused, and he researched the problem in the 1940's and 50's, and realised the missing colour is perceived in the way the brain handles the colour information from the eyes. Most Polaroid film is not three colour sensitive, only two, plus a weaker sensitivity via combination of the two layers and a dye filter.

A similar trick was used in the Technicolor rival Multicolor, developed into Cinecolor, which used just two sensitive layers that acted together on a third layer to make fuller spectrum.

Cinecolor's advantage was it used a conventional camera, unlike the complex three film at once Technicolor type.

It's disadvantage was murky colour!!, shared with the Polaroid film. It was only used by Hollywood to make cheaper B features like Cowboys and serials etc.

As an aside, Dr Land believed that dogs see in "limited" full colour, despite only two colour receptors in the retina. this is still disputed by a lot of researchers.

Stephen.

[mickeyobe]

I think that no matter what the process the purity of the primary colours is paramount.

As I said I am a pigment or red, blue, green believer.

Take the light primaries. Cyan, magenta and yellow.
Cyan is a mixture of blue and yellow.
Magenta combines red and blue.
Yellow stands on its own.
So all three pigment primaries are present even if mixed with blue.

Land's red and green also has all three colours - red and the green which is composed of blue and yellow.

The blue and red theory I'll wager had reds that tended toward orange (red and yellow) and blue that was greenish (blue and yellow}

What I am saying is that all the processes contain the three pigment primaries even if not in their purest, stand alone form.

Mickey

[daveh]

The other part of the colour equation is whether the process was additive or subtractive.

Years and years ago I made a few colour prints with black and white film using red, blue and green filters in turn and the enlarging onto colour paper using each of the filters again in the correct order. I did repeat it in a similar way a couple of years ago, but using a digital camera. (The result should still be on this forum somewhere)

I think additive systems were in place for several years before subtractive systems stared to arrive.

[daveh]

Just to say I've found that previous thread: Colour from B&W

Here's the final image redone in photoshop:

[Deleted]

Purple text is virtually unreadable on my computer. White on gray works best.

In printing we use CMYK color which stands for "Cyan, Magenta,Yelloe, Black." Gives a lot more control than RGB.

[mickeyobe]

Feb 1, 2014 12:48:39 GMT -5 wayne said:

Purple text is virtually unreadable on my computer. White on gray works best.

In printing we use CMYK color which stands for "Cyan, Magenta,Yelloe, Black." Gives a lot more control than RGB.

"K" for "Black"?

Mickey

[Stephen]

By the way, the "Murkyness" I referred to was in connection with Cinema film, where light had to travel through layers to others, and indeed some colour response may have been slightly out of focus in the Multicolor system, as the emulsion was on the front and back of one film strip.

One of the nicest additive colour systems was Dufay, made in the 1930's, transparencies at 5x4 plate size are quite stunning, giving very pure colour, and accurate in tone. They suffered low light transmission due to the colour grains being held in an opaque matrix of lines. It was tried twice for cinema, with one complete British film "Sons of the Sea". Development stopped due to the war, and by 1947 Agfa and Kodak shared the better modern processes.

There is a short sample of Multicolor on Youtube, the Marx Brothers in color, shot by Multicolor as an experiment. Most other early Multicolor has been lost over the years, Janet Gaynor's 1929 film musical "Sunny Side up" used to have a Multicolor finale, oddly printed by Technicolor!!, who could print all types of colour via matrix negs.

Personally I think that Kodak Kodachrome was the best slide film, very sharp.

Stephen.

[Deleted]

Feb 1, 2014 14:01:10 GMT -5 mickeyobe said:

Feb 1, 2014 12:48:39 GMT -5 wayne said:

Purple text is virtually unreadable on my computer. White on gray works best.

In printing we use CMYK color which stands for "Cyan, Magenta,Yelloe, Black." Gives a lot more control than RGB.

"K" for "Black"?

Mickey

Yep. "K" stands for black. Don't know why. It just does.

W.