Indigo — #3F00FF
Also known as: Electric Ultramarine
#3F00FF, primarily known as Indigo (also called Electric Ultramarine), is composed of 25% red, 0% green, and 100% blue in RGB. In CMYK it is 75% cyan, 100% magenta, 0% yellow, 0% black. In HSL the hue angle is 255°, saturation 100%, and lightness 50%. The closest web-safe color is #3300FF.
Color conversions
| Format | Value | Copy |
|---|---|---|
| HEX | #3F00FF | |
| RGB | rgb(63, 0, 255) | |
| HSL | hsl(254.8, 100%, 50%) | |
| HSV | hsv(254.8, 100%, 100%) | |
| CMYK | cmyk(75.3%, 100%, 0%, 0%) | |
| OKLCH | oklch(47.32% 0.3008 273.59) | |
| HWB | hwb(254.8 0% 0%) | |
| LAB | lab(32.2% 69.76 -107.58) | |
| LCH | lch(32.2% 128.2 303) | |
| OKLAB | oklab(47.32% 0.0188 -0.3002) | |
| XYZ | X 20.09 Y 8.27 Z 95.13 | |
| Web Safe | #3300FF | |
| RGB Percent | 24.7%, 0%, 100% | |
| Decimal | 4129023 |
| Format | Value | Copy |
|---|---|---|
| HEX | #3F00FF | |
| RGB | rgb(63, 0, 255) | |
| HSL | hsl(254.8, 100%, 50%) | |
| HSV | hsv(254.8, 100%, 100%) | |
| CMYK | cmyk(75.3%, 100%, 0%, 0%) | |
| OKLCH | oklch(47.32% 0.3008 273.59) | |
| HWB | hwb(254.8 0% 0%) |
| Format | Value | Copy |
|---|---|---|
| LAB | lab(32.2% 69.76 -107.58) | |
| LCH | lch(32.2% 128.2 303) | |
| OKLAB | oklab(47.32% 0.0188 -0.3002) | |
| XYZ | X 20.09 Y 8.27 Z 95.13 | |
| Web Safe | #3300FF | |
| RGB Percent | 24.7%, 0%, 100% | |
| Decimal | 4129023 |
Color harmonies
Harmony swatches keep the same saturation and lightness as the base color.
Complementary
Analogous
Triadic
Split-complementary
Tetradic
Square
Alternative colors
Nearby variations by nudging hue and lightness. Click a swatch to open that color.
Similar named colors
Nearest matches from our 30,000-name dataset (CIELAB ΔE). Click a swatch to open that color.
Tints, shades & tones
Contrast preview
On white
Sample
7.91:1
AA normal ✓ · AA large ✓
On black
Sample
2.66:1
AA normal ✗ · AA large ✗
Color blindness preview
Protanopia
75% similar
1.3% of men, 0.02% of women
Deuteranopia
79% similar
6% of men, 0.4% of women
Tritanopia
63% similar
0.001% of population
Achromatopsia
56% similar
0.003% of population
UI preview
Simplified components using a Tailwind-style scale generated from this color.
Button
Alert
Heads up
This alert uses lighter tints for the background and a mid-tone for the border.
Progress
67% complete