A perceptual color space where farther apart colors are
more easily discriminable.
The dark area marks colors that typical monitors can't show.
Lab colors are organized by their redness-to-greenness
(a, horizontal) and their blueness-to-yellowness (b, vertical).
The vertical bar controls the lightness of color.
These color channels are based on how the human brain processes
An alternative view of Lab in terms of chroma (colorfulness)
LCh is not the same as HSV, HSL, or HSB.
Jab is similar to Lab, where farther apart colors are more
The main difference is that Jab is based on a newer, updated color
This means that color distance should be more reliable for
approximating how discriminable two colors should be.
from a color space
from an image
OR drag image here.
Copy/Paste quoted list of css-valid colors:
Color palette information
Visualization color palette previews
Configure visualization previews
Color discriminability estimate
What is discriminability? A JND? What are these sliders?
This part of Chromaticity estimates whether colors are easily
discriminable by using empirical models that predict "just noticeable
differences" (JND). In Chromaticity, JNDs refer to whether you can
reliably tell two colors apart from one another.
The first slider – Percent (Conservativeness) – allows users to
define how strict they want "reliably" mean in for color
discriminability. A 50% would mean that 50% of people could easily
differentiate the two colors. While empirical studies often set
JNDs at 50%, stricter thresholds may make more sense in practice.
The second slider – Size (Visual Angle,
degrees) – refers to how large the pixels are on the screen and
ultimately on your retina.
Percent (Conservativeness): 50%
Size (Visual Angle, degrees): 0.10
1 degree ≈ index fingernail width when arm outstretched
Color discriminability estimates for color vision deficiencies
What are color vision deficiencies?
Color vision deficiency (“color blindness”)
refers to different mutations that affect color perception, and
affect roughly 8% of men and 0.5% of women.
While red-green color deficiency is most common (deuteranopia),
several other types exist and are caused by missing different
types of cone cells.
There are also less severe color vision deficiencies where
most but not all colors can be seen, which is caused by weak
rather than missing cone cells
(e.g., deuteranopia vs. deuteranomaly).