LCh to HWB | Color Code Converter | Color Conversion
Online LCh to HWB tool: enter a LCh color value to convert it to HWB in real time, with one-click copy of the result. Free and no registration required.
LChEnter or adjust the color values
rgba(255, 87, 51, 1)
HWB
hwb(11 20% 0%)
H
11
W
20
B
0
All Color Conversion Combinations
132 itemsAbout LCh to HWB
LCh to HWB is a free online tool that converts LCh to HWB, helping you quickly convert colors and switch between formats in web design, front-end development, and graphic design. LCh is The polar form of Lab, describing color with lightness L, chroma C, and hue H. HWB is Describes color through hue (H), whiteness (W), and blackness (B); a format introduced in CSS Color 4. At its core, LCh to HWB takes a color value expressed in LCh and converts it into HWB using a mathematical algorithm. The tool shows the result as both a visual color swatch and a complete CSS string, and you can copy it to the clipboard with a single click—no manual calculation or lookup tables required. This makes color code conversion fast, accurate, and reproducible, and it is suitable for designers, front-end developers, UI engineers, and anyone else who works with color.
What Is LCh to HWB
LCh is the polar form of Lab, describing color with lightness (L), chroma (C), and hue (H). It is more intuitive than Lab and closer to the way HSL is used. HWB describes color through hue (H), whiteness (W), and blackness (B). It is a format added in CSS Color 4. H is 0-360°, and W and B are 0-100%. First convert LCh to RGB, then to HSV, and finally compute W and B according to the HWB definition.
How to Use LCh to HWB
Using this LCh to HWB tool is very simple and takes just three steps. First, select LCh from the "Source Color Unit" dropdown on the left (it is selected by default), and enter the LCh value you want to convert in the input card. Second, select HWB from the "Target Color Unit" dropdown on the right; the tool instantly calculates and displays the corresponding HWB value, along with a color swatch preview and the complete CSS string, so you can confirm the color and format at a glance. Third, once you are happy with the result, click the "Copy" button to copy the HWB value to your clipboard and paste it straight into your code or design software. If you picked the wrong source or target unit, click the "⇄" button in the middle to swap them with one click. The whole process requires no registration and no data upload—all calculations run locally in your browser.
Use Cases for LCh to HWB
Use this when a modern CSS project needs HWB. Generating color scales in design systems, situations where only the chroma changes while the hue stays fixed, and modern CSS color schemes. Modern CSS projects, color-tuning tasks that need intuitive hue adjustment, and color schemes that complement HSL.
How LCh to HWB Works
First convert LCh to RGB, then to HSV, and finally compute W and B according to the HWB definition. LCh and Lab convert to each other losslessly: L stays the same, C = √(a²+b²), and H = atan2(b, a). This turns the two orthogonal chroma axes into "chroma + hue", which fits how humans think. The intuitive meaning of HWB is: first choose a pure hue, then add white (to lighten) or black (to darken) to it. W and B cannot both exceed 100%, and when their sum exceeds 100% they are normalized proportionally.
Tips for Using LCh to HWB
LCh to HWB is a cross-model conversion and may be clipped due to out-of-gamut values; after conversion W+B usually does not exceed 100%. The reference point for H in LCh differs from that in HSL, so the same visual hue has different numbers in LCh and HSL. Migrating directly from HSL to LCh requires recalibrating the hue. HWB is closer to the intuition of "adding white or black to paint" than HSL. W=B=0 gives a pure color, and W+B=100% gives gray.
Frequently Asked Questions (FAQ)
Is LCh to HWB accurate?
The HWB part is computed from the approximate RGB, so the accuracy is the same as LCh to RGB.
Can LCh to HWB go out of gamut?
It may. The part outside the sRGB gamut is clipped.
Which browsers support HWB?
Modern browsers such as Chrome 101+, Safari 15+, and Firefox 96+.
Both LCh and HSL can adjust hue, so what is the difference?
The hue in HSL is perceptually uneven, so the same angular difference looks different under different hues. The hue in LCh is more perceptually uniform and better suited to building color scales.
Which is easier to use, LCh or Lab?
Use Lab for mathematical computation and LCh for manual color adjustment. The two are equivalent; only the coordinate form differs.
What is the difference between HWB and HSL?
HSL controls lightness through the L channel, while HWB controls lightening and darkening separately through whiteness W and blackness B; the latter is closer to the physical experience of mixing paint.
Which browsers support HWB?
Modern browsers such as Chrome 101+, Safari 15+, and Firefox 96+ support it; older browsers may not.
Can I convert in the opposite direction?
Yes. You can go directly to the "HWB to LCh" page, or click the "⇄" swap button in the middle of the current page to exchange the source and target units and convert in the opposite direction. The reverse conversion is just as precise, because the color conversion math is reversible.
Can I use the conversion results commercially?
Yes. Color values are numerical information and involve no copyright issues, so you are free to use the conversion results in websites, apps, design work, or commercial projects without authorization or attribution. Do note, however: if the original color comes from material that someone else holds the copyright to, using the color itself is unrestricted, but the copyright to the original material still belongs to its author.