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Colour

#FEFF00

  • #FEFF00
  • Yellow
  • Light
  • Nearest: Yellow

#FEFF00 is a yellow with RGB values 254, 255, 0 and HSL 60°, 100%, 50%. It is a light colour, so black text on it reaches 19.5:1 contrast (AAA for normal text). The nearest named colour is Yellow.

Colour values

#FEFF00#FEFF00
HEX#FEFF00
RGBrgb(254, 255, 0)
RGB (0–1)0.9961, 1, 0
RGB percentages99.6%, 100%, 0%
HSLhsl(60.2, 100%, 50%)
HSV / HSBhsv(60.2, 100%, 100%)
CMYK0.4%, 0%, 100%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,711,424
CSS custom property--colour: #FEFF00;

Brightness & contrast

Relative luminance0.92591WCAG 2.x, 0 is black and 1 is white
Perceived brightness239.7 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 19.52:1
Contrast with white1.08:1WCAG normal text: Fail
Contrast with black19.52:1WCAG normal text: AAA
Greyscale equivalent#ECECEC
Inverted#0100FF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#FFF300no red cones; affects about 1% of men; ΔE 7.2 from the original
Deuteranopia#FFF931no green cones; the most common form, about 1% of men; ΔE 8.8 from the original
Tritanopia#FFEED9no blue cones; rare, and affects men and women equally; ΔE 85.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.08:1WCAG large text: Fail
Contrast with black, large text19.52:1WCAG large text: AAA

Named colours

Yellow · ΔE 0.4Gold · ΔE 23.6Green yellow · ΔE 33.4Yellow green · ΔE 38.1Chartreuse · ΔE 47.4Lawn green · ΔE 47.6
Nearest named CSS colourYellow (#FFFF00)ΔE 0.43, indistinguishable to the eye
Hue familyyellow
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0100FF
Analogous#FF8100, #7EFF00
Triadic#00FEFF, #FF00FE
Split complementary#007EFF, #8100FF
Tetradic#00FF81, #0100FF, #FF007F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFCC
Lighter +30%#FFFF99
Lighter +20%#FEFF66
Lighter +10%#FEFF33
Darker −10%#CBCC00
Darker −20%#989900
Darker −30%#666600
Darker −40%#333300
More saturated +25%#FEFF00
Less saturated −25%#DEDF20

Channel breakdown

R254
G255
B0
Red254 (99.6%)
Green255 (100%)
Blue0 (0%)
Hue60.24°
Saturation (HSL)100%
Lightness50%
Dominant channelGreen
Hex per channelR FE · G FF · B 00

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Every value on this page was computed from “feff00” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.