From everyones friends at more.net I recived a table of contrast listing. I'm wanting to know the cut off for passing when it comes to the 508 standards with the ADA.<br />
<br />
here it is...<br />
<br />
The brightness of a color can be calculated by using this formula:<br />
RED * 0.299 + GREEN * 0.587 + BLUE * 0.114<br />
Where RED, GREEN, and BLUE are numbers between 0 and 1.<br />
<br />
Subtract the darker color's brightness from the brighter to determine<br />
the contrast. I do not know what constitutes "sufficient" contrast.<br />
<br />
Here's a hexadecimal to fractional decimal (i.e. FF = 1.0) table.<br />
All values (except top left and bottom right) begin with "0."<br />
For example, from the original email, AEA999 = 0.682, 0.663, 0.600;<br />
0.682 * 0.299 + 0.663 * 0.587 + 0.600 * 0.114 = 0.661499 brightness<br />
<br />
0 1 2 3 4 5 6 7 8 9 A B C D E F<br />
0 0.0 004 008 012 016 020 024 027 031 035 039 043 047 051 055 059 <br />
1 063 067 071 075 078 082 086 090 094 098 102 106 110 114 118 122 <br />
2 125 129 133 137 141 145 149 153 157 161 165 169 173 176 180 184 <br />
3 188 192 196 200 204 208 212 216 220 224 227 231 235 239 243 247 <br />
4 251 255 259 263 267 271 275 278 282 286 290 294 298 302 306 310 <br />
5 314 318 322 325 329 333 337 341 345 349 353 357 361 365 369 373 <br />
6 376 380 384 388 392 396 400 404 408 412 416 420 424 427 431 435 <br />
7 439 443 447 451 455 459 463 467 471 475 478 482 486 490 494 498 <br />
8 502 506 510 514 518 522 525 529 533 537 541 545 549 553 557 561 <br />
9 565 569 573 576 580 584 588 592 596 600 604 608 612 616 620 624 <br />
A 627 631 635 639 643 647 651 655 659 663 667 671 675 678 682 686 <br />
B 690 694 698 702 706 710 714 718 722 725 729 733 737 741 745 749 <br />
C 753 757 761 765 769 773 776 780 784 788 792 796 800 804 808 812 <br />
D 816 820 824 827 831 835 839 843 847 851 855 859 863 867 871 875 <br />
E 878 882 886 890 894 898 902 906 910 914 918 922 925 929 933 937 <br />
F 941 945 949 953 957 961 965 969 973 976 980 984 988 992 996 1.0 <br />
<br />
Hey, you read this far! Cool!<br />
<br />
Regards,<br />
<br />
David K. Drum<br />
<!-- e --><a href="mailto:[email protected]">[email protected]</a><!-- e --><br />
this gives me the first part! the contacts i've been given are for a mary lou, and ken. Has anyone had experince with this? i'm wanting to have this thing live in a new format before weeks end!<br />
<br />
i like colors! and draurings!<br />
chris<pixelmonkey>:monkey:<!--content-->AHHHHHHHHHHHHHHHHH!!!!! why cant i find a strait answer!? all i want to have happen is someone, anyone! from the ADA to contact me and say "your site fails!" then an electronic document sent to me saying the same thing!<br />
<br />
i'm pulling my hair out here! can someone give me the right direction!?<br />
chris<pixelmonkey>:monkey:<!--content-->careful, careful...if you pull all that hair out we can't call you monkey boy anymore
<br />
<br />
how about these sites, I am not sure if they help.<br />
<!-- m --><a class="postlink" href="http://www.section508.gov/">http://www.section508.gov/</a><!-- m --><br />
<!-- m --><a class="postlink" href="http://www.cast.org/bobby/">http://www.cast.org/bobby/</a><!-- m --><!--content-->yesterday the clouds parted, people laughed, and the answers to my questions came to life! <br />
1.) The contrast levels that were once a requirement for an ADA 508 compliant site have been dripped!<br />
2.) A grandfathers clause does exist for all contaent currently posted, so the "old" pdf files are ok to remain!<br />
and the rest i had better not speak of... anyhoot, our site is now up to the 508 standard and keeping everyone happy!<br />
<br />
thanks!<br />
chris<pixelmonkey>:monkey:<!--content-->
<br />
here it is...<br />
<br />
The brightness of a color can be calculated by using this formula:<br />
RED * 0.299 + GREEN * 0.587 + BLUE * 0.114<br />
Where RED, GREEN, and BLUE are numbers between 0 and 1.<br />
<br />
Subtract the darker color's brightness from the brighter to determine<br />
the contrast. I do not know what constitutes "sufficient" contrast.<br />
<br />
Here's a hexadecimal to fractional decimal (i.e. FF = 1.0) table.<br />
All values (except top left and bottom right) begin with "0."<br />
For example, from the original email, AEA999 = 0.682, 0.663, 0.600;<br />
0.682 * 0.299 + 0.663 * 0.587 + 0.600 * 0.114 = 0.661499 brightness<br />
<br />
0 1 2 3 4 5 6 7 8 9 A B C D E F<br />
0 0.0 004 008 012 016 020 024 027 031 035 039 043 047 051 055 059 <br />
1 063 067 071 075 078 082 086 090 094 098 102 106 110 114 118 122 <br />
2 125 129 133 137 141 145 149 153 157 161 165 169 173 176 180 184 <br />
3 188 192 196 200 204 208 212 216 220 224 227 231 235 239 243 247 <br />
4 251 255 259 263 267 271 275 278 282 286 290 294 298 302 306 310 <br />
5 314 318 322 325 329 333 337 341 345 349 353 357 361 365 369 373 <br />
6 376 380 384 388 392 396 400 404 408 412 416 420 424 427 431 435 <br />
7 439 443 447 451 455 459 463 467 471 475 478 482 486 490 494 498 <br />
8 502 506 510 514 518 522 525 529 533 537 541 545 549 553 557 561 <br />
9 565 569 573 576 580 584 588 592 596 600 604 608 612 616 620 624 <br />
A 627 631 635 639 643 647 651 655 659 663 667 671 675 678 682 686 <br />
B 690 694 698 702 706 710 714 718 722 725 729 733 737 741 745 749 <br />
C 753 757 761 765 769 773 776 780 784 788 792 796 800 804 808 812 <br />
D 816 820 824 827 831 835 839 843 847 851 855 859 863 867 871 875 <br />
E 878 882 886 890 894 898 902 906 910 914 918 922 925 929 933 937 <br />
F 941 945 949 953 957 961 965 969 973 976 980 984 988 992 996 1.0 <br />
<br />
Hey, you read this far! Cool!<br />
<br />
Regards,<br />
<br />
David K. Drum<br />
<!-- e --><a href="mailto:[email protected]">[email protected]</a><!-- e --><br />
this gives me the first part! the contacts i've been given are for a mary lou, and ken. Has anyone had experince with this? i'm wanting to have this thing live in a new format before weeks end!<br />
<br />
i like colors! and draurings!<br />
chris<pixelmonkey>:monkey:<!--content-->AHHHHHHHHHHHHHHHHH!!!!! why cant i find a strait answer!? all i want to have happen is someone, anyone! from the ADA to contact me and say "your site fails!" then an electronic document sent to me saying the same thing!<br />
<br />
i'm pulling my hair out here! can someone give me the right direction!?<br />
chris<pixelmonkey>:monkey:<!--content-->careful, careful...if you pull all that hair out we can't call you monkey boy anymore
<br /><br />
how about these sites, I am not sure if they help.<br />
<!-- m --><a class="postlink" href="http://www.section508.gov/">http://www.section508.gov/</a><!-- m --><br />
<!-- m --><a class="postlink" href="http://www.cast.org/bobby/">http://www.cast.org/bobby/</a><!-- m --><!--content-->yesterday the clouds parted, people laughed, and the answers to my questions came to life! <br />
1.) The contrast levels that were once a requirement for an ADA 508 compliant site have been dripped!<br />
2.) A grandfathers clause does exist for all contaent currently posted, so the "old" pdf files are ok to remain!<br />
and the rest i had better not speak of... anyhoot, our site is now up to the 508 standard and keeping everyone happy!<br />
<br />
thanks!<br />
chris<pixelmonkey>:monkey:<!--content-->