Un-inclusive Inclusivity Document

As part of the work i’m doing at AIG on a building in Manchester i’m consulting the Design For Access 2 document issued by Manchester City Council

I can safely say that this is one of the most unpleasant documents i’ve ever read, not because of the conent, but because fo the horrendous colour choice they’ve made.

Presumably this meets some esoteric metric about maximum contrast (and therefore legibility) but the result is something that can barely be read for bursts of more than 10 seconds.

In attempting to be inclusive they’ve positively discriminated me as someone with good, normal eyesight. This is an amazing example of the power of box ticking in ruining design processes.

It also raises the ongoing presumption that all disability groups can be lumped together and catered for with singular and fundamentally thoughtless approaches.

Have a look at this page and see if you can bare to read it:

W3C mathematics for colour brightness

this is the way the W3C calculate the brightness of colours on screen, while entirely tailored to the world of RGB screens and hexadecimal codes it does suggest a more rigorous approcah to analysing colour combinations. Anyhting that removes the apparent personal taste of a designer is obviously going ot be useful in any information design context. Here’s the science bit:

Ideally, images and multimedia object should also be tested for color visibility but algorithms are beyond the scope of this specification.

Color visibility can be determined according to the following algorithm:

(This is a suggested algorithm that is still open to change.)

Two colors provide good color visibility if the brightness difference and the color difference between the two colors are greater than a set range.

Color brightness is determined by the following formula:
((Red value X 299) + (Green value X 587) + (Blue value X 114)) / 1000
Note: This algorithm is taken from a formula for converting RGB values to YIQ values. This brightness value gives a perceived brightness for a color.

Color difference is determined by the following formula:
(maximum (Red value 1, Red value 2) – minimum (Red value 1, Red value 2)) + (maximum (Green value 1, Green value 2) – minimum (Green value 1, Green value 2)) + (maximum (Blue value 1, Blue value 2) – minimum (Blue value 1, Blue value 2))

The rage for color brightness difference is 125. The range for color difference is 500.

Here’s the original article: http://www.w3.org/TR/AERT#color-contrast