edited sliders to +.4 exposure, +.8 contrast,-.2 shadows, +.2 highlights, +.2 saturation, +.3 sharpness; 0 fill light.

Used eyedrop tool for color, spotted on white of left rose, indicated 29C+20M but I thought that was too much a jump, so I pulled it back to 18C+14M. Reds did indeed have a lot of color variation on the flowers.
28-70mmEX lens, sunlight white balance in-camera and in software; center area metering, probably focused on brightest flower at left