Candles are used for many purposes. Manifestation, Concentration focal points, Attraction, Banishing, Clarity, Purification, etc. etc. etc.
Some colors have universal meanings but  you can use your imagination and intuition as you work. some anoint their candles to help in their intention and some place crystals at the bace to also add specific energies.
NEVER leave candles unattended.
Below is a small guide to candle color attraction ideas.
Black: protection, absorbing, banishing
Red: root work, grounding, personal power, attraction
Orange: sacral chakra, sexuality, creativity, emotional healing
Yellow: solar plexus, personal power, boundary setting, confidence 
Green: heart, grief, gratitude, self-love, divine love, bridging chakras together
Blue: throat, expression, boundary work, invoking truth
Purple: crown, divine connection, peace, calmness
Pink: self-love, divine feminine

Candles

Red Candle 4"
$0.50 - $1.35
$0.50 - $1.35
Pink Candle 4"
$0.50 - $1.35
$0.50 - $1.35
Orange Candle 4"
$0.50 - $1.35
$0.50 - $1.35
Blue Candle 4"
$0.50 - $1.35
$0.50 - $1.35
Purple Candle 4"
$0.50 - $1.35
$0.50 - $1.35
Green candle 4"
$0.50 - $1.35
$0.50 - $1.35
Black Candle 4"
$0.50 - $1.35
$0.50 - $1.35
White candle 4"
$0.50 - $1.35
$0.50 - $1.35
Yellow Candle 4"
$0.00
$0.00
White Votive
$3.50 - $4.50
$3.50 - $4.50
Pink Votive
$3.50 - $4.50
$3.50 - $4.50
Violet Votive
$3.50 - $4.50
$3.50 - $4.50
Orange Votive
$3.50 - $4.50
$3.50 - $4.50
Yellow Votive
$3.50 - $4.50
$3.50 - $4.50
Green Votive
$3.50 - $4.50
$3.50 - $4.50
Light Blue Votive
$3.50 - $4.50
$3.50 - $4.50
Blue Votive
$3.50 - $4.50
$3.50 - $4.50
Brown Votive
$3.50 - $4.50
$3.50 - $4.50
Black Votive
$3.50 - $4.50
$3.50 - $4.50
Red Votive
$3.50 - $4.50
$3.50 - $4.50
Purple Votive
$3.50 - $4.50
$3.50 - $4.50
Clear Votive Holder
$1.75
$1.75