5-step gradient: Strong red (#990000) to Luminous vivid cyan (#00ffff).

RGB Gradient: Strong red to Luminous vivid cyan

Spot colors

 
 
 
 
 
#990000 #723f3f #4c7f7f #26bfbf #00ffff
Export palette (gpl/png/ase)

Linear gradient

CSS
background-image: linear-gradient(135deg, #990000, #00ffff);
Output

HSV Clockwise Gradient: Strong red to Luminous vivid cyan

Spot colors

 
 
 
 
 
#990000 #b28500 #66cc00 #00e539 #00ffff
Export palette (gpl/png/ase)

Linear gradient

CSS
background-image: linear-gradient(135deg, #990000, #b28500, #66cc00, #00e539, #00ffff);
Output

HSV Counterclockwise Gradient: Strong red to Luminous vivid cyan

Spot colors

 
 
 
 
 
#990000 #b20085 #6600cc #0039e5 #00ffff
Export palette (gpl/png/ase)

Linear gradient

CSS
background-image: linear-gradient(135deg, #990000, #b20085, #6600cc, #0039e5, #00ffff);
Output