In this chapter, we will understand the importance of Color Channel Functions in LESS. LESS supports few in-built functions which set value about a channel. The channel set the value depending on the color definition. The HSL colors have hue, saturation and lightness channel and the RGB color have red, green and blue channel. The following table lists out all the color channel functions −
| Sr.No. |
Function & Description |
Example |
| 1 |
hue
In HSL color space, the hue channel is extracted off the color object.
|
background: hue(hsl(75, 90%, 30%));
It compiles in the CSS as shown below −
background: 75;
|
| 2 |
saturation
In HSL color space, the saturation channel is extracted off the color object.
|
background: saturation(hsl(75, 90%, 30%));
It compiles in the CSS as shown below −
background: 90%;
|
| 3 |
lightness
In HSL color space, the lightness channel is extracted off the color object.
|
background: lightness(hsl(75, 90%, 30%));
It compiles in the CSS as shown below −
background: 30%;
|
| 4 |
hsvhue
In HSV color space, the hue channel is extracted off the color object.
|
background: hsvhue(hsv(75, 90%, 30%));
It compiles in the CSS as shown below −
background: 75;
|
| 5 |
hsvsaturation
In HSL color space, the saturation channel is extracted off the color object.
|
background: hsvsaturation(hsv(75, 90%, 30%));
It compiles in the CSS as shown below −
background: 90%;
|
| 6 |
hsvvalue
In HSL color space, the value channel is extracted off the color object.
|
background: hsvvalue(hsv(75, 90%, 30%));
It compiles in the CSS as shown below −
background: 30%;
|
| 7 |
red
The red channel is extracted off the color object.
|
background: red(rgb(5, 15, 25));
It compiles in the CSS as shown below −
background: 5;
|
| 8 |
green
The green channel is extracted off the color object.
|
background: green(rgb(5, 15, 25));
It compiles in the CSS as shown below −
background: 15;
|
| 9 |
blue
The blue channel is extracted off the color object.
|
background: blue(rgb(5, 15, 25));
It compiles in the CSS as shown below −
background: 25;
|
| 10 |
alpha
The alpha channel is extracted off the color object.
|
background: alpha(rgba(5, 15, 25, 1.5));
It compiles in the CSS as shown below −
background: 2;
|
| 11 |
luma
luma value is calculated off a color object.
|
background: luma(rgb(50, 250, 150));
It compiles in the CSS as shown below −
background: 71.2513323%;
|
| 12 |
luminance
The luma value is calculated without gamma correction.
|
background: luminance(rgb(50, 250, 150));
It compiles in the CSS as shown below −
background: 78.53333333%;
|
