What color Makes people hungry Chapter 4 Color
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What color Makes people hungry?
Chapter 4 Color- page 80 How We See Color in our environments comes from two sources: Spectral Colored Light- Colored light inherent in nature Spectral colors- are colored bands of energy and appear in order from longest to shortest red, orange, yellow, green, blue and violet. On each side of the spectral colors are infrared (too long to see) and ultraviolet (too short to see. ) Pigments (dyestuffs)-come from two sources: Natural compounds of the earth Chemically compounded colors
Chapter 4 Color- How we see color Subtractive Color Theory- When natural or artificial light hits a colored object, all of the spectral waves are absorbed or “subtracted” except the hues that are pigmented, painted or dyed. Colors placed very near one another are visually mixed by a process known as subtractive color mixing (optical color mixing) This allows us to interpret colors other than spectral colors
Chapter 4 Color- How we see color Visual Acuity and Deficiency Most people see color in the same way, but some people can decipher or distinguish more of over the 10 million colors that the human eye can potentially see. These people have greater visual acuity. Other people have various deficiencies in their cones and rods to decipher colors and they so this less accurately. What was once called color blindness is now called color deficiency.
Chapter 4 Color- How we see color Metamerism or metameric effect is the apparent change in color from one light to another. Judgment of true color is made under full spectrum light which is all of the wavelengths of visible energy as seen on a clear cloudless day. Most artificial light sources lean toward warm or cool so the spectral energy distribution varies.
Chapter 4 Color- How we see color Spectral energy distribution factors: • Orientation- the direction of natural light East- clear and bright North- clear and cool South- constant and warm West- hazy and hot • Season and climate • Artificial lighting • Incandescent lighting More warm wavelengths than cool • Economy fluorescent lighting More cool wavelengths than warm • Warm fluorescent lighting • Combustion lighting- candlelight or firelight