Lovely mentioned something about jack painted in yellow. well I did some investigation about the meaning of the color yellow. Heres what I found
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Yellow is the color of sunshine. It's associated with joy, happiness, intellect, and energy.
Yellow produces a warming effect, arouses cheerfulness, stimulates mental activity, and generates muscle energy. Yellow is often associated with food. Bright, pure yellow is an attention getter, which is the reason taxicabs are painted this color. When overused, yellow may have a disturbing effect; it is known that babies cry more in yellow rooms. Yellow is seen before other colors when placed against black; this combination is often used to issue a warning. In heraldry, yellow indicates honor and loyalty. Later the meaning of yellow was connected with cowardice.
Use yellow to evoke pleasant, cheerful feelings. You can choose yellow to promote children's products and items related to leisure. Yellow is very effective for attracting attention, so use it to highlight the most important elements of your design. Men usually perceive yellow as a very lighthearted, 'childish' color, so it is not recommended to use yellow when selling prestigious, expensive products to men – nobody will buy a yellow business suit or a yellow Mercedes. Yellow is an unstable and spontaneous color, so avoid using yellow if you want to suggest stability and safety. Light yellow tends to disappear into white, so it usually needs a dark color to highlight it. Shades of yellow are visually unappealing because they loose cheerfulness and become dingy.
Dull (dingy) yellow represents caution, decay, sickness, and jealousy.
Light yellow is associated with intellect, freshness, and joy.
theres a little more to this
Sorry if Im posting too much
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The shade of yellow determines the meaning. Pure, bright and sunny yellow is the easiest color to see. People who are blind to other colors can usually see yellow. Yellow is full of creative and intellectual energy. Always use yellow note pads.
Yellow symbolizes wisdom. Yellow means joy and happiness. People of high intellect favor yellow. Yellow daffodils are a symbol of unrequited love. Sunday's color is yellow-gold.
Yellow Energy
Like the energy of a bright sunny day, yellow brings clarity and awareness. The shade of yellow determines its effect: Yellow-green can mean deceit, and creates a disoriented feeling. Orange-yellow imparts a sense of establishment. Clean light yellow clears the mind, making it active and alert.
Put some yellow in your life when you want:
-clarity for decision-making
-relief from 'burnout', panic, nervousness, exhaustion
-sharper memory and concentration skills
-protection from lethargy and depression during dull weather