Free Online Color Picker from Image
How can I pick a color from an image?
One way is by compressing the image, which reduces file size without resizing it. However, increasing compression may cause some quality loss as data is removed.
Another method is resizing your photo, reducing the pixel dimensions of the image. Resizing does not reduce image quality, although small details may be lost.
Most photos from modern cameras and cellphones have over 6 million pixels, but most screens only display around 1.5 million pixels. This means you often view a resized version of the image unless printing it. By reducing the image's width and height, the number of pixels matches the screens displaying it, retaining quality even in full-screen mode.
If you have a large photo, resizing it to around 1900 by 1100 pixels in JPG format with 90% quality will give you a high-quality, versatile image that is quick to share.