RGB to HWB | Color Code Converter | Color Conversion
Online RGB to HWB tool: enter a RGB color value to convert it to HWB in real time, with one-click copy of the result. Free and no registration required.
RGBEnter 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 RGB to HWB
RGB to HWB is a free online tool that converts RGB to HWB, helping you quickly convert colors and switch between formats in web design, front-end development, and graphic design. RGB is Represents color through the values of the red, green, and blue channels, each ranging from 0 to 255. HWB is Describes color through hue (H), whiteness (W), and blackness (B); a format introduced in CSS Color 4. At its core, RGB to HWB takes a color value expressed in RGB 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 RGB to HWB
RGB represents color through the values of the red, green, and blue channels. Each channel ranges from 0-255, and the combination of the three channels covers roughly 16.77 million colors, making it the foundational color model for screen display. 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 RGB to HSV, then follow the HWB definition: W = (1-S) × V and B = 1 - V, giving the three components of HWB.
How to Use RGB to HWB
Using this RGB to HWB tool is very simple and takes just three steps. First, select RGB from the "Source Color Unit" dropdown on the left (it is selected by default), and enter the RGB 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 RGB to HWB
Use this when a modern CSS project needs an HWB representation, or for color tuning that follows an "add white / add black" approach. Screen display, Canvas drawing, and any situation where a program needs to compute colors dynamically (such as generating a heat map from numeric data). Modern CSS projects, color-tuning tasks that need intuitive hue adjustment, and color schemes that complement HSL.
How RGB to HWB Works
First convert RGB to HSV, then follow the HWB definition: W = (1-S) × V and B = 1 - V, giving the three components of HWB. RGB is an additive model: the higher the channel values, the brighter the color. When all three channels are 0 the result is black, and when all are 255 it is white. Every pixel on a screen is formed by mixing red, green, and blue subpixels at different brightness levels. 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 RGB to HWB
When converting RGB to HWB, W+B generally does not exceed 100%; if it does, the original color is close to gray and the tool normalizes it automatically. RGB is easy for programs to compute and iterate on, but the human eye finds it hard to interpret what a given set of numbers will look like, so it suits machine processing more than manual color adjustment. 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)
What are W and B in HWB?
W is the amount of white added and B is the amount of black added; both are adjustments made on top of the pure hue.
Which is more intuitive, HWB or HSL?
It depends on your habits. HSL suits adjusting light and dark, while HWB suits the physical approach of "adding white and black".
Which browsers support HWB?
Modern browsers such as Chrome 101+, Safari 15+, and Firefox 96+.
Why is the RGB range 0-255?
Because each channel is represented by 8 binary bits, and 2^8 = 256, so the range is 0-255.
What is the difference between RGB and RGBA?
RGBA adds an Alpha transparency channel on top of RGB, with a value from 0-1 that represents opacity.
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 RGB" 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.