Confusion colors for red-green color blindness include:

Cyan and Grey
Rose-Pink and Grey
Blue and Purple
Yellow and Neon Green
Red, Green, Orange, BrownConfusion colors for blue-yellow color blindness include:

Yellow and Grey
Blue and Green
Dark Blue/Violet and Black
Violet and Yellow-Green
Red and Rose-PinkThese colors of confusion are defined quantitatively by straight confusion lines plotted in CIEXYZ, usually plotted on the corresponding chromaticity diagram. The lines all intersect at a copunctal point, which varies with the type of color blindness. Chromaticities along a confusion line will appear metameric to dichromats of that type. Anomalous trichromats of that type will see the Chromaticities as metameric if they are close enough, depending on the strength of their CVD. For two colors on a confusion line to be metameric, the Chromaticities first have to be made isoluminant, i.e. to have the same Lightness. Note also that colors that may be isoluminant to the standard observer (typical trichromat) may not be isoluminant to a dichromat. Color tasks
Cole describes four color tasks, all of which are impeded to some degree by color blindness:

Comparative – When multiple colors must be compared, such as with mixing paint
Connotative – When colors are given an implicit meaning, such as red = stop
Denotative – When identifying colors, for example by name, such as “where is the yellow ball?”
Aesthetic – When colors look nice – or convey an emotional response – but don’t carry explicit meaningColor blindness causes difficulty in all four kinds of color tasks. The following sections will describe specific color tasks that the colorblind typically have difficulty with.
APP tends to occur in women more frequently than in men, and is usually less severe than other forms of generalized pustular psoriasis such as impetigo herpetiformis. This form of psoriasis is characterized by ring-shaped plaques with pustules around the edges and yellow crusting. APP most often affects the torso, neck, arms, and legs. Diagnosis
Classification
Pustular psoriasis is classified into two major forms: localized and generalized pustular psoriasis. Within these two categories there are several variants:

Management
injection of methotrexate

References


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