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Contrast and Colour adjustment
Contrast attracts the eye, adds visual interest to a composition and can be in many different forms. Your first thought may be color contrast such as warm vs. cool and dark vs. light. While color is an extremely essential principle of contrast, there are also things like contrast of type, alignment and size. These different principles all play a vital role in whether or not you have a successful design that's appealing and easy to follow.
Photopea
Making images vibrant
Brightening your images
Photoshop
Create a living galaxy (effects)
Apply this cool sparkle effect