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Colour

#FFFF00

  • #FFFF00
  • Yellow
  • Light
  • Named: Yellow

#FFFF00 is the CSS colour yellow with RGB values 255, 255, 0 and HSL 60°, 100%, 50%. It is a light colour, so black text on it reaches 19.6:1 contrast (AAA for normal text). The nearest named colour is Yellow.

Colour values

#FFFF00#FFFF00
HEX#FFFF00
HEX (short)#FF0
RGBrgb(255, 255, 0)
RGB (0–1)1, 1, 0
RGB percentages100%, 100%, 0%
HSLhsl(60, 100%, 50%)
HSV / HSBhsv(60, 100%, 100%)
CMYK0%, 0%, 100%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,776,960
CSS custom property--colour: #FFFF00;

Brightness & contrast

Relative luminance0.9278WCAG 2.x, 0 is black and 1 is white
Perceived brightness240 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 19.56:1
Contrast with white1.07:1WCAG normal text: Fail
Contrast with black19.56:1WCAG normal text: AAA
Greyscale equivalent#EDEDED
Inverted#0000FF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#FFF400no red cones; affects about 1% of men; ΔE 6.3 from the original
Deuteranopia#FFFA31no green cones; the most common form, about 1% of men; ΔE 8.3 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 text1.07:1WCAG large text: Fail
Contrast with black, large text19.56:1WCAG large text: AAA

Named colours

Yellow · ΔE 0Gold · ΔE 23.3Green yellow · ΔE 33.8Yellow green · ΔE 38.4Goldenrod · ΔE 47.5Chartreuse · ΔE 47.9
This is a named CSS colourYellow (#FFFF00)exact match
Hue familyyellow
CSS keyword usableyellow

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0000FF
Analogous#FF8000, #80FF00
Triadic#00FFFF, #FF00FF
Split complementary#0080FF, #8000FF
Tetradic#00FF80, #0000FF, #FF0080

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFCC
Lighter +30%#FFFF99
Lighter +20%#FFFF66
Lighter +10%#FFFF33
Darker −10%#CCCC00
Darker −20%#999900
Darker −30%#666600
Darker −40%#333300
More saturated +25%#FFFF00
Less saturated −25%#DFDF20

Channel breakdown

R255
G255
B0
Red255 (100%)
Green255 (100%)
Blue0 (0%)
Hue60°
Saturation (HSL)100%
Lightness50%
Dominant channelRed and Green
Hex per channelR FF · G FF · B 00

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Every value on this page was computed from “ffff00” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.