"We have to come to terms with the ugly truth that skin color, age and economics played a significant role in who survived and who did not, " he said.

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The presentation of color hinges on age, practise, nationality, and additionally personal selection.

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By the late fifties, the transistor was invented, and we entered a new age of color television, later, instant color film and even personal computers.

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"Blue is a safe color with appeal across gender and age groups, " he notes.

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Roy Berns says what curators and conservators want is to banish the effects of age and the unintended quirks of light and color.

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That happened with Dr. Waggoner's son at age 6, prompting the doctor to develop pediatric color-vision tests using shapes instead of numbers, now used by about 15% of school nurses.

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Combined with location, age and other info, this data unlocks an array of potential visualizations color-coded by different categories, letting you see patterns you might not have noticed before.

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