Symbolism: life, fire, rebirth, transformation, power, purity
Symbols: sun flowers, leaves, sword, spear, sun, God's eye, sun wheels, bonfire, balefires, fire, sun dials, bird feathers, seashells,
Colors: red, gold, orange, yellow, white, green, blue
Food and Drink: mead, ale, summer fruits and vegetables, strawberries, honey cakes, whipped cream, oranges, lemons, summer squash, honey
Herbs: Saint John's Wort, lavender, rose, peony, vervain, mugwort, chamomile, chickweed, chicory, sun flower, lily, thyme, hemp, fennel, nettle, wisteria, rue, fern, heather, oak, yarrow, holly
Deities: Ra, Bast, Helios, Oak King, Fotuna, Arinna, and other sun god.
Crystals and Gemstones: Lapis, diamond, tiger's eye, emerald, jade, and other green stones
Animals: butterflies, wren, horse, stag, robin, cattle, phoenix, dragon, faeries, satyrs
Magic: Litha is the time to celebrate the Sun and all that he provides for us. Protection spells and fire magic are great to perform on this night. Make protective amulets to be empowered in the balefire lit on Midsummer's eve. Looking to promote a transformation, a new career, or create a new or strengthen an old relationship? Litha is a great night to perform such magic. Collect herbs, especially St. John's Wort, on the eve of this sabbat to bring luck and enhance the herbs' power. Renew your wedding vows or just enjoy the time with your friends and family. This is also a great time to communicate with faeries and seek their help if you so wish. Be careful though. Faeries can be tricky.
Please note this is not a complete list but a brief overview of symbols, colors, herbs, deities, and the like. If I have missed something that you feel should make the list, please feel free to contact me via the comments or through email.