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Colour

#EFFF18

  • #EFFF18
  • Yellow
  • Light
  • Nearest: Yellow

#EFFF18 is a yellow with RGB values 239, 255, 24 and HSL 64°, 100%, 55%. It is a light colour, so black text on it reaches 19:1 contrast (AAA for normal text). The nearest named colour is Yellow.

Colour values

#EFFF18#EFFF18
HEX#EFFF18
RGBrgb(239, 255, 24)
RGB (0–1)0.9373, 1, 0.0941
RGB percentages93.7%, 100%, 9.4%
HSLhsl(64.2, 100%, 54.7%)
HSV / HSBhsv(64.2, 90.6%, 100%)
CMYK6.3%, 0%, 90.6%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,728,408
CSS custom property--colour: #EFFF18;

Brightness & contrast

Relative luminance0.89937WCAG 2.x, 0 is black and 1 is white
Perceived brightness235.2 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 18.99:1
Contrast with white1.11:1WCAG normal text: Fail
Contrast with black18.99:1WCAG normal text: AAA
Greyscale equivalent#EBEBEB
Inverted#1000E7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#FFF200no red cones; affects about 1% of men; ΔE 12.8 from the original
Deuteranopia#FFF539no green cones; the most common form, about 1% of men; ΔE 14.1 from the original
Tritanopia#FFEFDAno blue cones; rare, and affects men and women equally; ΔE 84.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.11:1WCAG large text: Fail
Contrast with black, large text18.99:1WCAG large text: AAA

Named colours

Yellow · ΔE 7.3Green yellow · ΔE 26.6Gold · ΔE 27.7Yellow green · ΔE 32.8Chartreuse · ΔE 41Lawn green · ΔE 41.1
Nearest named CSS colourYellow (#FFFF00)ΔE 7.27, clearly different but related
Hue familyyellow
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#2818FF
Analogous#FF9B18, #7CFF18
Triadic#18EFFF, #FF18EF
Split complementary#187CFF, #9B18FF
Tetradic#18FF9B, #2818FF, #FF187C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FDFFE4
Lighter +30%#FAFFB1
Lighter +20%#F6FF7E
Lighter +10%#F3FF4B
Darker −10%#D4E400
Darker −20%#A5B100
Darker −30%#757E00
Darker −40%#464B00
More saturated +25%#EFFF18
Less saturated −25%#D6E235

Channel breakdown

R239
G255
B24
Red239 (93.7%)
Green255 (100%)
Blue24 (9.4%)
Hue64.16°
Saturation (HSL)100%
Lightness54.71%
Dominant channelGreen
Hex per channelR EF · G FF · B 18

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Every value on this page was computed from “efff18” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.