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Recognised as Colour

#EFFF54

  • #EFFF54
  • Yellow
  • Light
  • Nearest: Yellow

#EFFF54 is a yellow with RGB values 239, 255, 84 and HSL 66°, 100%, 66%. It is a light colour, so black text on it reaches 19.1:1 contrast (AAA for normal text). The nearest named colour is Yellow.

Colour values

#EFFF54#EFFF54
HEX#EFFF54
RGBrgb(239, 255, 84)
RGB (0–1)0.9373, 1, 0.3294
RGB percentages93.7%, 100%, 32.9%
HSLhsl(65.6, 100%, 66.5%)
HSV / HSBhsv(65.6, 67.1%, 100%)
CMYK6.3%, 0%, 67.1%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,728,468
CSS custom property--colour: #EFFF54;

Brightness & contrast

Relative luminance0.90511WCAG 2.x, 0 is black and 1 is white
Perceived brightness236.8 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 19.1:1
Contrast with white1.1:1WCAG normal text: Fail
Contrast with black19.1:1WCAG normal text: AAA
Greyscale equivalent#EFEFEF
Inverted#1000AB

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#FFF33Ano red cones; affects about 1% of men; ΔE 13.2 from the original
Deuteranopia#FFF661no green cones; the most common form, about 1% of men; ΔE 12.8 from the original
Tritanopia#FEF1DDno blue cones; rare, and affects men and women equally; ΔE 70.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.1:1WCAG large text: Fail
Contrast with black, large text19.1:1WCAG large text: AAA

Named colours

Yellow · ΔE 18.9Yellow green · ΔE 25Green yellow · ΔE 27.6Gold · ΔE 27.9Khaki · ΔE 35.9Goldenrod · ΔE 43.4
Nearest named CSS colourYellow (#FFFF00)ΔE 18.92, a distinctly different colour
Hue familyyellow
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6454FF
Analogous#FFB954, #9AFF54
Triadic#54EFFF, #FF54EF
Split complementary#549AFF, #B954FF
Tetradic#54FFB9, #6454FF, #FF549A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FDFFED
Lighter +20%#F9FFBA
Lighter +10%#F4FF87
Darker −10%#EAFF21
Darker −20%#D7ED00
Darker −30%#A9BA00
Darker −40%#7A8700
More saturated +25%#EFFF54
Less saturated −25%#DEEA69

Channel breakdown

R239
G255
B84
Red239 (93.7%)
Green255 (100%)
Blue84 (32.9%)
Hue65.61°
Saturation (HSL)100%
Lightness66.47%
Dominant channelGreen
Hex per channelR EF · G FF · B 54

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Every value on this page was computed from “efff54” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.