RGB to HSV Converter

Instantly convert RGB to HSV with real-time color preview. Essential for designers, developers, and digital artists.

HSV Color Model: Hue (0°–360°), Saturation (0%–100%), Value (0%–100%). An intuitive representation of colors.

#
HSV Conversion Results
0°
Hue
100%
Saturation
100%
Value
RGB Input
rgb(255, 0, 0)
HSV Output
hsv(0°, 100%, 100%)
Hex Value
#FF0000

Conversion formula summary:

R', G', B' = R/255, G/255, B/255; Cmax = max(R',G',B'); Cmin = min(R',G',B'); Δ = Cmax - Cmin. Hue calculation depends on which channel is max. Saturation = Δ / Cmax (if Cmax>0) else 0. Value = Cmax.

Understanding RGB and HSV Color Spaces

RGB (Red, Green, Blue) is an additive color model used in displays. Each component ranges from 0 to 255. HSV (Hue, Saturation, Value) is a cylindrical representation that aligns more closely with human perception.

HSV Components:

  • Hue (H): The color type (e.g., red, green, blue) measured in degrees from 0 to 360.
  • Saturation (S): The intensity/purity of the color (0% = gray, 100% = full color).
  • Value (V): The brightness of the color (0% = black, 100% = brightest).

Conversion Algorithm

Standard conversion from RGB to HSV (with R,G,B in [0,255]): 

R' = R/255
G' = G/255
B' = B/255
Cmax = max(R', G', B')
Cmin = min(R', G', B')
Δ = Cmax - Cmin

// Hue calculation:
if Δ == 0: H = 0
else if Cmax == R': H = 60 * ((G' - B')/Δ mod 6)
else if Cmax == G': H = 60 * ((B' - R')/Δ + 2)
else if Cmax == B': H = 60 * ((R' - G')/Δ + 4)

// Saturation:
if Cmax == 0: S = 0
else: S = Δ / Cmax

// Value:
V = Cmax

// Convert H to degrees [0,360), S and V to percentages

Why Use HSV?

  • Intuitive adjustments: Changing hue rotates color, saturation adjusts vibrancy, value controls lightness.
  • Color picking: Many design tools use HSV/HSB for easier selection.
  • Computer vision: HSV is robust to lighting changes, used in image processing.

Frequently Asked Questions

HSV (Hue, Saturation, Value) and HSL (Hue, Saturation, Lightness) differ in the "L" vs "V". Value (V) is the maximum of RGB components, while Lightness (L) is the average. HSV is often preferred for color picking, while HSL tries to be more perceptually uniform.

When all RGB components are equal, the color is on the grayscale axis (no hue). In such cases, hue is mathematically undefined and conventionally set to 0. Saturation becomes 0, so the hue value is irrelevant.

Yes, the reverse conversion is well-defined. Check our HSV to RGB tool (see related tools) for that conversion.