About

Color space conversion from RGB to HSV is a non-trivial geometric remapping. RGB defines color as additive light channels (R, G, B each in 0 - 255), while HSV separates chromatic information into Hue (H, 0 - 360°), Saturation (S, 0 - 100%), and Value (V, 0 - 100%). Feeding malformed CSV into a pipeline without validation silently corrupts palettes. Values outside the 0 - 255 range or swapped column order produce wrong hues. This tool parses CSV with full RFC 4180 compliance, validates every triplet, flags errors per row, and outputs clean HSV data ready for design systems or shader uniforms.

The conversion assumes sRGB input with no gamma pre-correction. Results are rounded to two decimal places for H and one decimal for S and V. Achromatic colors (where R = G = B) return H = 0° by convention, not undefined. Pro tip: if your CSV uses hex strings instead of decimal channels, pre-convert to integer triplets first.

Formulas

The RGB to HSV conversion operates on normalized channel values. Given input R, G, B ∈ [0, 255], first compute normalized values R′, G′, B′ by dividing each by 255.

R′ = R255 C_max = max(R′, G′, B′) C_min = min(R′, G′, B′) Δ = C_max − C_min

Hue calculation is piecewise, depending on which channel is dominant:

{

H = 0° if Δ = 0H = 60° × G′ − B′Δ mod 6 if C_max = R′H = 60° × (B′ − R′Δ + 2) if C_max = G′H = 60° × (R′ − G′Δ + 4) if C_max = B′

Saturation and Value:

S =

{

0 if C_max = 0ΔC_max × 100 otherwise

V = C_max × 100

Where H ∈ [0, 360)°, S ∈ [0, 100]%, V ∈ [0, 100]%. Δ is the chroma (color intensity). When Δ = 0, the color is achromatic (gray) and H is undefined, conventionally set to 0.

Reference Data

Color Name	R	G	B	H (°)	S (%)	V (%)
Red	255	0	0	0	100	100
Green	0	128	0	120	100	50.2
Blue	0	0	255	240	100	100
Yellow	255	255	0	60	100	100
Cyan	0	255	255	180	100	100
Magenta	255	0	255	300	100	100
White	255	255	255	0	0	100
Black	0	0	0	0	0	0
Orange	255	165	0	38.82	100	100
Deep Pink	255	20	147	327.57	92.2	100
Lime Green	50	205	50	120	75.6	80.4
Steel Blue	70	130	180	207.27	61.1	70.6
Gold	255	215	0	50.59	100	100
Coral	255	127	80	16.11	68.6	100
Slate Gray	112	128	144	210	22.2	56.5
Dark Violet	148	0	211	282.09	100	82.7
Turquoise	64	224	208	174	71.4	87.8
Salmon	250	128	114	6.18	54.4	98
Medium Gray	128	128	128	0	0	50.2
Indigo	75	0	130	274.62	100	51

Frequently Asked Questions

The converter accepts CSV with three numeric columns representing R, G, B values (integers 0 - 255). Optional header rows are auto-detected. Supported delimiters include comma, semicolon, and tab. An optional fourth column for labels/names is preserved in output. Quoted fields per RFC 4180 are handled correctly.

When Δ = 0 (all channels equal, making gray), hue is mathematically undefined because the fraction G′ − B′Δ produces a division by zero. By convention, H is set to 0°. For pure red (255,0,0), the formula legitimately yields 0°. Distinguish them by checking S: achromatic colors have S = 0%.

Values below 0 are clamped to 0. Values above 255 are clamped to 255. Non-numeric entries in a row cause that row to be flagged as an error and excluded from conversion output. The error count and specific row numbers are reported in the results summary.

No. This tool performs a direct mathematical RGB→HSV conversion on raw channel values. It assumes linear sRGB input. If your CSV contains gamma-encoded values (standard for most displays and image editors), the HSV output corresponds to the perceptual color as displayed. For colorimetrically accurate conversions, linearize values first by applying inverse sRGB gamma: C_linear = ((C_sRGB + 0.055) ÷ 1.055)^2.4 for values > 0.04045.

The converter processes files entirely in-browser with no server upload. Files up to approximately 50MB or 500,000 rows are handled reliably. Processing uses chunked execution to prevent UI freezing. For datasets exceeding 100,000 rows, expect 2 - 5 seconds of processing time depending on device capability.

Yes. The converter auto-detects whether the first column is non-numeric and treats it as a label. Supported layouts: R,G,B (3 columns) or Label,R,G,B (4 columns). Labels are preserved in the HSV output. You can also configure column mapping manually if your CSV uses a different order.