White text

Jamie Fraser

Hi,

This must be simple but I am missing something. I want to put some text on a coloured solid hatch that will print pure white (not a feint grey) but I can't get it right. It either prints black or a feint grey. Can anyone help me out please.

Thanks

Jamie

Anthony Apostolaros

Have you tried the "True Color" tab of the Select Color dialog?

For white, set Saturation to 0 and Luminosity to maximum.

Jamie Fraser

Thanks Anthony, that worked....but why does setting index colour 255 (which has the same RGB value as the settings you gave me equates to) produce a grey rather than white?

Jamie

Jamie Fraser

...and why does index colour 7 (described as white) display and print as black?

I bet this is obvious when you know the answer and I'll feel stupid when you explain it.

Yaacov Lazar

Lemee quess, you set the background as black, don't you. (Like all us old hands)

Try setting the background  to white, color no. 7 will go to black.

It's a special default display color.

Jamie Fraser

Yaacov,

I have the background as white, but I see what you mean. If I change it to black then index colour 7 shows as white. But I still don't see why it doesn't print as pure white. Also, it is seems a bit awkward that if you put white text (index 7) on a coloured solid hatch that it still shows as black if the model space background is white.

Is it just me or is this all a bit wierd?

Martin Breternitz

Where is the 24 bit color value stored? Group code #62 only contains the next similar 8 bit color value.

Roy Klein Gebbinck

@Martin Breternitz: #420

Anthony Apostolaros

Jamie:  The display color of all entities with index color #7 is set by the variable BKGCOLOR, not on an entity-by-entity basis. That thing about index color 255 seems odd. I assume that the Select Color dialog isn't being completely honest with us about that color's RGB values.

Martin:  Code 420 is the product of the three RGB codes. If non-nil it overrides 62.

Martin Breternitz

The formula RGB to #420 is: R * 65536 + G * 256 + B. Right?

Roy Klein Gebbinck

That's right.

For information on color conversion: http://www.jtbworld.com/lisp/DisplayColorProperties.htm (look for: "OLEtoRGB_color2")