1999–2004 Colby was born to
Liza Colby, who had decided to have a child via artificial insemination. Liza chose
Dr. Jake Martin to be the sperm donor and the father of her child; but Liza's ex-husband,
Adam Chandler was jealous of this arrangement and secretly had purchased the sperm bank, and substituted his own sperm donation for Jake's, therefore, making him Colby's biological father. At the time of Colby's birth, both Liza and Jake had believed that Jake was her father, therefore, the child was originally named "Colby Marian Martin". In 2000, when Jake had sued for custody of the child, it was revealed that Adam was actually Colby's biological father.
2006–2011 In 2006, a rebellious Colby Chandler, then
incognito, shows up in Pine Valley. She steals a car and gets arrested, refusing to give the authorities her name. She makes a phone call and is revealed to be
Adam Chandler's long-lost daughter, aged by several years. She ran away from her mother,
Liza Colby after years in hiding. Several years before, Liza had divorced Adam. Determined to save her daughter, Colby from Adam's nefarious ways that have "poisoned" the lives of his other children, she took Colby and went on the run. Colby has missed her father terribly and is now angry at Liza for banishing him from her life. Colby is now a spoiled brat, who plays on her father's guilt by demanding extravagant luxuries, such as a lavish
Sweet Sixteen party, putting her at odds, with Adam's then wife, Krystal Carey. During this lavish party, Colby had crashed her father's yacht and began a relationship, with Sean Montgomery. Soon after the party, she had a pregnancy scare. Her father and brother had found out, and had asked, who the father was. Although she knew Sean was the only possible father, she had claimed that, it could be
Josh Madden to get back at Babe, who she had assumed was having an affair, with him. On April 11, 2007, Colby had helped deliver Krystal's baby girl at the Chandler Mansion. On April 12, Krystal honored Colby by naming her daughter, "Jenny Colby Carey". On July 12, Krystal also had named Colby, Jenny's godmother. After Colby had learned that, Adam had paid Ava Benton to plant drugs on Sean, she had moved out of her father's mansion and had moved in, with her goddaughter Jenny, Krystal, and
Tad Martin. Colby is initially spoiled, selfish and hostile towards Krystal, and Babe, but her time in Pine Valley had changed her and she put the bulk of her bad behavior behind her, and had emerged a much kinder and generous person. In 2008, Sean and Colby broke up, because Sean had cheated on Colby, with
Zach Slater's ex-lover,
Hannah Nichols, who was much older than Sean. After the breakup, Sean had moved out of Pine Valley and is now very seldom mentioned. Colby became fast friends with
Cassandra Foster, who had recently moved to town from
Paris to live, with her mother,
Angela Hubbard. Colby had originally planned college to attend
Wellesley College, but she had turned down her acceptance there in favor of Pine Valley University, hoping to stay close to her family. Around this time Colby and Dre had liked each other slightly, but it never blossomed into anything. Colby had developed a requisite crush on the older,
Frankie Hubbard, upon meeting him. Initially, Frankie was annoyed, by Colby, but came to love her as a little sister, during the time they were kidnapped together and almost killed. Frankie sees her as a "kid", and nixed a possible relationship between the two. Colby become quite intoxicated at her 18th birthday party. Dre was driving Colby's car, when he and Cassandra decided to bring her home. He ran over someone in the road, but was unable to determine what the object was, since it was nighttime. The next day, upon learning that, Richie Novak had been struck by a car on the same road at approximately simultaneously, the three teenagers had feared that, they had inadvertently killed him. Unaware that, Richie had actually been murdered earlier that, evening, by his sister,
Annie Lavery, the teens vowed to keep the entire incident a secret. It has, since been public knowledge that, Annie was the one who had killed Richie. During the whole Richie incident, Pete Cortlandt started to hang around Colby and developed a crush on her. Initially, Colby had wanted nothing to do, with him, but after he was struck, by lightning, she had realized that, she did like him as a friend. They had remained friends for a well, although they had kissed on occasion and Pete, made it clear, he still had a crush on her. Then after Petey's house burned down they began to date. Although she can sometimes act spoiled, Colby is mostly a sweet loyal girl, who is incredibly defensive of her friends and family. Although both Dre and Cassandra had moved away, she is still friends, with Ren and Corinna. During the Richie storyline, Colby had a slight drinking problem that, had fizzled out around the time of the tornado that, had killed Babe. Colby now lives, with her father, her brother and her nephew. In May 2009, Colby's uncle,
Stuart Chandler is accidentally shot. Although they end up finding out in the finale episode that,
Stuart Chandler was alive and being held captive and taken care of, by Dr.
David Hayward. Adam and Stuart are identical twins so it is believed that, someone had assumed they were shooting Adam. It is later revealed that, Adam accidentally shot Stuart, because
David Hayward is switching up his heart medications. Adam also marries Annie after she saves his life. Colby and her brother,
JR constantly find ways to annoy her and get her out of the mansion. In May 2009, Liza returns to town, with the news that, she is pregnant and supposedly give birth a son that, she had named after Colby's late uncle, Stuart. Colby later finds out that, Liza was never actually pregnant and that, Liza was supposed to adopt the son of
Amanda Dillon to keep him away from
David Hayward, who was believed to be the father. Amanda's husband, Jake switches Amanda's baby, with the newborn son of Bailey Wells and
Damon Miller. Colby later decides that, she wants to work things out, with her parents. Damon begins acting out and is accused of breaking, into houses around town, well Colby assumes he is innocent. Damon is, proven guilty and Colby is furious, with him. Meanwhile, JR is diagnosed with
leukemia. He falls, into a short coma and Damon assures Colby that, JR is aware of everything that, is going on around him. Liza notices a closeness between Damon and Colby, and tries to keep them apart. Damon takes Colby's car and she follows him, which leads to them getting, into a car accident, with
Brooke English. Colby is okay, but Brooke and Damon need surgery. Liza overhears Damon admitting to Colby that, he wants to be more than just friends and tries to sabotage his chance of staying out of prison. But Damon is later diagnosed, with
ADHD and sent to therapy instead. The new boy in town Asher Pike saves her from falling from a railing at Chandler Enterprises. In 2011, she finds out that, her ex-boyfriend, Damon and her mother, Liza slept together and after finding out she had posted a video of herself ranting about what happened between Damon and her mother, Liza and the video went viral. She does not want anything to do, with her mother after she had found out. Colby had started to embrace the video after people appreciated her story and has, made more videos for a vlog on the internet. On August 31, 2011, Colby packs her stuff and leaves the Chandler mansion, and goes back to live, with Liza, due to JR blackmailing his ex-wife, and AJ's legal mother and biological aunt,
Marissa Tasker, into giving him full custody and Colby is furious, so she packs and leaves.
2013 Colby returns to Pine Valley reverting to her old scheming manipulative ways. she tries to get some money from her father and when he refuses she sets her sights on Pete Cortlandt, which causes some tension between Pete and Celia. The two eventually break up and although Colby manages to get the loan from David Hayward she is able to seduce Pete and the two end up sleeping together. ==Reception==