The formula below converts CIE 1931 xy values into its Duv value.
#Black light color converter series
(Waveform Lighting's FilmGrade series of products have a Duv tolerance of +/- 0.003). For more demanding applications, a Duv range between -0.003 and +0.003 is preferred. What are acceptable Duv values?ĪNSI and EnergyStar recommend Duv values between -0.006 and +0.006. dark room with an ultraviolet light (e.g.
If and only if both Duv and CCT values are provided, an exact color point can be pinpointed. color and then emits light of a different color with a longer wavelength. Many phosphors and neon colors will act very similar under the very saturated blue LED. On the other hand, if we were given information that a lamp had a CCT value of 3500K and a Duv = 0.001, this would give us sufficient information to know that it is along the 3500K iso-CCT line, slightly above the black body curve. However, you can create a black light-like output using the blue LED. This color space separates grayscale information from color data, so the same signal can be used for both color and black. In other words, if a lamp has a CCT value of 3500K, in reality, it can be anywhere along this iso-CCT line. Iso-CCT lines describe points whose CCT value are the same.įor 3500K, you will see the line extend from a yellowish hue in the area above the black body curve (larger Duv value), while it will transition towards a pink/magenta hue as you move down the same 3500K iso-CCT line below the black body curve (lower, negative Duv value). In the graphic below, you will find iso-CCT lines for various CCT values. This is because CCT alone does provide enough information about the exact color.
#Black light color converter full
Why is Duv important?ĭuv is an important metric whenever discussing color sensitive lighting applications, such as film & photography. All modern browsers support the following 140 color names (click on a color name, or a hex value, to view the color as the background-color along with different text colors): For a full overview of CSS colors, visit our colors tutorial. In short, Duv conveniently provides both magnitude and directional information about a color point's distance from the black body curve. Converting Colors allows you to convert between color formats like HEX, RGB, CMYK and more.
It is typically used in conjunction with a correlated color temperature (CCT) value in explaining how close to the black body curve ("pure white") a particular light source is.Ī negative value indicates that the color point is below the black body curve (magenta or pink) and a positive value indicates a point above the black body curve (green or yellow).Ī more positive value indicates a point farther above the black body curve, while a more negative value indicates a point farther below the black body curve. Duv is a metric that is short for "Delta u,v" (not to be confused with Delta u',v') and describes the distance of a light color point from the black body curve.
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