If you see distinct vertical stripes or steps in the gradient, your monitor is operating in 8-bit mode or has poor dithering. A 10-bit panel will show a perfectly smooth blend.
D50 (5000K)
Print · Warm yellow
D55 (5500K)
Daylight · Slightly warm
D65 (6500K)
sRGB standard · Neutral white
D75 (7500K)
Overcast · Slightly cool blue
Base red
Reference
ΔE 1.0
Almost identical
ΔE 3.0
Noticeable
ΔE 5.0
Obvious shift