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How To understand colors
for text and background

invisible ink ?

IF your computer displays the black text on a black background it will act like invisible ink .

So when you highlighted and email or webpage it forces a color change by adding or subtracting a value to the color

Now highlight the blue box above





Black 000000
Blue 000099
Yellow FFFF00

The math is a bit tricky because of the hexadecimal values range (base 16) from
0 through 9 , A, B, C, D, E, F (A=10, B=11, C=12, D=13, E=14, F=15)
or 16 levels (or values) stored in 6 places

Why? Hexadecimal is more efficiently understood by computers.

Values could be like


To convert a number from base 16 to base 10, you read it like this:
43 in base 16 = 4 X 161 + 3 X 160 = 64 + 3 = 67 in base 10.
Do the steps in this order

raise the base to the power
multiply the result by the place value
add the result for each place

Remember that letters just stand for numbers between 10 and 15.

222222 = real number value (Base 10) of 2,236,962
66FFCC = real number value of 6,750,156
999999 = real number value of 10,066,329
FFFFFF = real number value of 16,777,215

Want to convert some numbers the easy way   click.gif (3780 bytes)

So if the value of the Text is 66FFCC and the Background is 66FFCC you do
not see only one color Now you found out more than you wanted to about Color
on Text & backgrounds in email, internet pages

If you want to play a little (on a good computer) click on http://www.noel-1.com/color_test.htm and just move your mouse (do not click) over
the numbers like above.

What basic color is 66FFCC? You should be able to tell with the above color chart


16 Million Different Colors

The combination of Red, Green and Blue values from 0 to 255 gives a total of more than 16 million different colors to play with (256 x 256 x 256).

Most modern monitors are capable of displaying at least 16384 different colors.

If you look at the color table below, you will see the result of varying the red light from 0 to 255, while keeping the green and blue light at zero.

Red Light HEX


  #000000  rgb(0,0,0) 
  #080000  rgb(8,0,0) 
  #100000  rgb(16,0,0) 
  #180000  rgb(24,0,0) 
  #200000  rgb(32,0,0) 
  #280000  rgb(40,0,0) 
  #300000  rgb(48,0,0) 
  #380000  rgb(56,0,0) 
  #400000  rgb(64,0,0) 
  #480000  rgb(72,0,0) 
  #500000  rgb(80,0,0) 
  #580000  rgb(88,0,0) 
  #600000  rgb(96,0,0) 
  #680000  rgb(104,0,0) 
  #700000  rgb(112,0,0) 
  #780000  rgb(120,0,0) 
  #800000  rgb(128,0,0) 
  #880000  rgb(136,0,0) 
  #900000  rgb(144,0,0) 
  #980000  rgb(152,0,0) 
  #A00000  rgb(160,0,0) 
  #A80000  rgb(168,0,0) 
  #B00000  rgb(176,0,0) 
  #B80000  rgb(184,0,0) 
  #C00000  rgb(192,0,0) 
  #C80000  rgb(200,0,0) 
  #D00000  rgb(208,0,0) 
  #D80000  rgb(216,0,0) 
  #E00000  rgb(224,0,0) 
  #E80000  rgb(232,0,0) 
  #F00000  rgb(240,0,0) 
  #F80000  rgb(248,0,0) 
  #FF0000  rgb(255,0,0) 

Have had enough? if Not  click.gif (3780 bytes)


Last update was at  04/07/2008 02:43:16 PM

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