Magic, as practiced by Pagans, is as different as their various traditions. It would be impossible to give you a single definitive answer. What I can give you is the "basics" from our circle. As we are in the northern hemisphere, these are what we use.
Samhain (late fall - Oct 31) the third harvest.
The colours tend to be deep Oranges, reds, browns and black.
The symbols are the scrying mirror, the cauldron, fall leaves, and on occasion jack-o-lanterns.
Yule (winter -Dec 21)) is the winter solstice.
The colours are: whites and blues (for snow), red and green (for the Holly King), and black and silver (for the Winter Crone).
The symbols include, the scale tipped fully with the moon high, the battle of the Holly King and the Oak King, holly, evergreen trees, candles, and stars.
Candlemas (late winter Feb 2) also known as Imbolg.
Colours include white (for milk and the Maiden) yellow (for daffodils), green (for the coming spring), red (for the Mother) and black (for the crone). Symbols include candles (we make and bless all the candles we intend to use for the coming year), and the triple goddess (in our tradition the goddess in her three aspects visits us).
Ostara (spring Mar 21) the vernal equinox.
The colours tend toward pastels, pale pink, lavender, soft blue, light green, pale yellow, and peach (for spring).
The symbols include a balanced scale, rabbits, eggs, and spring flowers.
Bealtain (early summer may 1) the Celtic begining of summer.
The colours are Greens and golds, as well as fire colours.
The symbols are: the maypole, wells, and fires.
Litha (Summer June 21st) the summer solstice.
The colours are sunny and bright, with lots of yellows and golds, oranges and bright pinks.
The symbols are the sun, the Oak King and the Holly King, and the scale tipped fully with the sun high.
Lammas (late summer, August 1st) the first harvest.
The colours tend to soft golds and tans (for ripe wheat and the Sun King), greens and berry colours (for the fruits of the vine and the Green man) and dark browns and black (for the earth and the Dark Hunter).
The symbols are a sheaf of wheat, the crescent boline, corn, fruits of the field, and the triple god (the god in three aspects visit us at this time.
Mabon (fall September 21) the autumnal equinox and the second harvest.
The colours are harvest colours - orange and yellow, red and brown.
The symbols include the balanced scale, fall leaves, the bounty of the harvest and the cornucopia.
Seasonal colors differ with each season. For instance, for fall colors will tend to be red and yellow like leaves and spring will have lighter and brighter colors.
Magic spelled this way is show magic. Magick spelled this way is real magick or religious magick.
all the colors
No, you can not "get magick" but you can study and practice magick.
Seasonal dimorphism.
Mathematical Magick was created in 1648.
Heavy on the Magick was created in 1986.
Heavy on the Magick happened in 1986.
nothing
Invocation of Magick was created in 2006-02.
The duration of Magick Eve is 1800.0 seconds.
Just the Seasonal colors of Fall.