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Color conversion

RGB to HSV color conversion

Convert RGB (0–255) to HSV/HSB (hue °, saturation %, value %). Standard formulas, examples, and color chart. Runs locally in your browser. Try it free.

Instant result
Result
—

Enter values to convert.

Inputs —
Mode —
Formula —

Formulas

Core equations used by this converter.

R'R' = R / 255
G'G' = G / 255
B'B' = B / 255
CmaxCmax = max(R', G', B')
CminCmin = min(R', G', B')
isRGB-style 8-bit channels (0–255) unless noted. Calculation runs locally in your browser.

How to use

1

Choose RGB → HSV or HSV → RGB

Use the tabs in the converter to switch direction.

2

Enter RGB or HSV values

Fill in the active fields for the selected direction.

3

Convert and read the result

Use Convert or let the result update automatically.

Example conversions

Common values with formula and result.

ϟ

rgb(255, 0, 0) → HSV

rgb(255, 0, 0) → HSV

Cmax = 1, Δ = 1
hsv(0°, 100%, 100%)
ϟ

rgb(0, 0, 255) → HSV

rgb(0, 0, 255) → HSV

→ hsv(240°, 100%, 100%)
hsv(240°, 100%, 100%)
ϟ

rgb(128, 0, 0) → HSV (maroon)

rgb(128, 0, 0) → HSV (maroon)

R' = 128/255 ≈ 0.502
hsv(0°, 100%, 50%)

RGB to HSV color conversion specification

Version 1.1.0 · Engine tested

Calculation status
  • Engine tested 3 published cases
  • Named expert review Not performed
  • Calculation version 1.1.0

Review policy

Definition
**RGB** — red, green, blue **0–255**.
What it calculates
Convert RGB (0–255) to HSV/HSB (hue °, saturation %, value %). Standard formulas, examples, and color chart.
Inputs
  • Values required by the selected conversion mode
Outputs
  • Converted result in the target unit or format
Formula
R' = R / 255 · G' = G / 255 · B' = B / 255
RGB to HSV color table
Color nameHexRGBHSV
Black#000000(0,0,0)(0°, 0%, 0%)
White#FFFFFF(255,255,255)(0°, 0%, 100%)
Red#FF0000(255,0,0)(0°, 100%, 100%)
Lime#00FF00(0,255,0)(120°, 100%, 100%)
Blue#0000FF(0,0,255)(240°, 100%, 100%)
Yellow#FFFF00(255,255,0)(60°, 100%, 100%)
Cyan#00FFFF(0,255,255)(180°, 100%, 100%)
Magenta#FF00FF(255,0,255)(300°, 100%, 100%)
Silver#C0C0C0(192,192,192)(0°, 0%, 75%)
Gray#808080(128,128,128)(0°, 0%, 50%)
Maroon#800000(128,0,0)(0°, 100%, 50%)
Olive#808000(128,128,0)(60°, 100%, 50%)
Assumptions
  • Conversion runs locally in the browser; values are not uploaded.
  • Uses the formulas documented on this page.
Units
  • R'
  • G'
  • B'
Boundary conditions
  • Empty or invalid input yields no valid result.
  • Out-of-range values may be rejected by the tool runtime.
Example
rgb(255, 0, 0) → HSV → hsv(0°, 100%, 100%)
Validation cases
  • rgb(255, 0, 0) → HSV → hsv(0°, 100%, 100%)
  • rgb(0, 0, 255) → HSV → hsv(240°, 100%, 100%)
  • rgb(128, 0, 0) → HSV (maroon) → hsv(0°, 100%, 50%)
Sources
  • CalculatorX converter runtime
  • Standard unit / encoding definitions where applicable
Calculation version
1.1.0

Background

Interpretation and common distinctions.

Use the converter tabs to switch direction when available. Results for RGB to HSV color conversion update locally in your browser.

rgb HSV to RGB › rgb RGB to HSL › rgb RGB to hex ›

Frequently asked questions

Key distinctions behind the conversion.

How do you convert using RGB to HSV color conversion?

Use R' = R / 255. Example: rgb(255, 0, 0) → HSV → hsv(0°, 100%, 100%).

Can I switch direction?

Open the related reverse converter listed under Related tools.

Does this run online or locally?

Calculation runs locally in your browser. Values are not uploaded.

How precise are the results?

Results follow the formulas on this page. Round to the precision your use case needs.