Gaara has large reserves of strong chakra, a fact Akamaru recognises even before Gaara has performed any technique. His chakra levels are partly because he was the jinchūriki of Shukaku, but even after Shukaku is removed from his body in Part II, there is no noticeable difference in his performance. Because Shukaku was an early creation pre-dating the red chakra mode that the other Jinchuuriki have.
Doesn't make him any weaker than the others (except for Kurama). Imo, Shukaku may be one of the stronger Tailed Beasts due to having strong sealing abilities because Tailed Beasts are susceptible to sealing jutsu. Gaara has the black markings around his eyes because of his status as a jinchuriki and his use of sand techniques.
Jinchurikis are shinobi who have one of the nine tailed beasts sealed inside of them, and the physical markings around their eyes are a side effect of containing the tailed beast chakra. In Gaara's case, he contains Shukaku, the one-tailed tanuki, so the dark rings around his. I thought all chakra was blue.
No, I'm pretty sure all character have different colors. In fact Naruto's chakra color is yellow but the anime turned it into blue and Sasuke is purple in the color pages of Dei v Sasuke fight it has Sasuke with purple chakra doing chidori and his susano color is purple as well. Gaara, a high-caliber ninja, has a natural affinity for one of the five chakra natures.
Most high caliber ninjas can use two or three chakra natures quite effectively due to their talent and practice. Download Gaara color scheme from Naruto SeriesGaara Color Palette This Gaara from Naruto Series has Aqua, Beige, Black, Blue, Brown, Light Brown, Red, Skin & White Colors. Gaara represents an anomaly in the pattern of jinchūriki partial transformations.
Whereas all other jinchūriki's transformations are composed of chakra, Gaara's is made of sand. He gradually piles sand onto his body, giving him an increasingly closer similarity to Shukaku with changing eyes to match. Naruto's chakra is yellow.
Kishimoto draws the rasengan as yellow and he tells Jiraya his normal chakra is yellow but sometimes he feels a red chakra. The anime just makes it so everyone's chakra is a blue color. Gaara can also crush any mineral into sand to control it and the sand is heavily resilient to most forms of fire due to the chakra.
He can also combine magnet release to increase the density of the sand's chakra. Sand Clone: Gaara can create a clone of himself made out of sand. He can erupt opponents for extra damage if he wants to.
Gaara, a powerful character in the manga, channeled Shukaku's chakra and slowly became him, eventually relinquishing control to him. He never learned how to control the tailed beast chakra, and around the time of fights, he focused on himself.