HWB to LCh | Color Code Converter | Color Conversion
Online HWB to LCh tool: enter a HWB color value to convert it to LCh in real time, with one-click copy of the result. Free and no registration required.
HWBEnter or adjust the color values
rgba(255, 87, 51, 1)
LCh
lch(60.18% 82.49 41.2)
L
60.18
C
82.49
H
41.2
All Color Conversion Combinations
132 itemsAbout HWB to LCh
HWB to LCh is a free online tool that converts HWB to LCh, helping you quickly convert colors and switch between formats in web design, front-end development, and graphic design. HWB is Describes color through hue (H), whiteness (W), and blackness (B); a format introduced in CSS Color 4. LCh is The polar form of Lab, describing color with lightness L, chroma C, and hue H. At its core, HWB to LCh takes a color value expressed in HWB and converts it into LCh 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 HWB to LCh
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%. 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. First convert HWB to RGB and Lab, and finally turn a and b into the polar C and H.
How to Use HWB to LCh
Using this HWB to LCh tool is very simple and takes just three steps. First, select HWB from the "Source Color Unit" dropdown on the left (it is selected by default), and enter the HWB value you want to convert in the input card. Second, select LCh from the "Target Color Unit" dropdown on the right; the tool instantly calculates and displays the corresponding LCh 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 LCh 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 HWB to LCh
Use this when generating a color scale with the same hue but different chroma. Modern CSS projects, color-tuning tasks that need intuitive hue adjustment, and color schemes that complement HSL. Generating color scales in design systems, situations where only the chroma changes while the hue stays fixed, and modern CSS color schemes.
How HWB to LCh Works
First convert HWB to RGB and Lab, and finally turn a and b into the polar C and H. 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. 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.
Tips for Using HWB to LCh
The reference point for H in LCh differs from that in HWB, so the same visual hue has a different number; recalibrate when migrating across models. 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. 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.
Frequently Asked Questions (FAQ)
Is the H of LCh the same as the H of HWB?
No. The two have different reference points.
Does HWB to LCh change the color?
No. The conversion only changes the expression.
Is LCh suitable for building color scales?
Yes, especially for generating a scale of the same hue with different chroma.
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.
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.
Can I convert in the opposite direction?
Yes. You can go directly to the "LCh to HWB" 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.