#EFFB55#EFFB55

#EFFB55 is a very light, vivid yellow. Relative luminance 0.880; OKLCH L 95.0% C 0.183 H 113.4°. Best body text is #000000 at 18.60:1 contrast (WCAG AA passes).

Color values

HEX#EFFB55
RGBrgb(239, 251, 85)
HSLhsl(64, 95%, 66%)
HSVhsv(64, 66%, 98%)
CMYKcmyk(4.8%, 0%, 66.1%, 1.6%)
CIE-LABlab(95.16, -23.91, 74.66)
CIE-LCHlch(95.16, 78.39, 107.76°)
OKLaboklab(95.01% -0.0725 0.1677)
OKLCHoklch(95.01% 0.183 113.4)
XYZxyz(71.7355, 88.0024, 21.7998)
Luminance0.8800 (WCAG relative)
Temperaturewarm
Familyyellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#EFFB55 #6155FB
analogous
#FBB455 #EFFB55 #9CFB55
triadic
#EFFB55 #55EFFB #FB55EF
tetradic
#EFFB55 #55FBB4 #6155FB #FB559C
square
#EFFB55 #55FBB4 #6155FB #FB559C
split-complementary
#EFFB55 #559CFB #B455FB
monochromatic
#C2D105 #E9FA19 #EFFB55 #F5FC91 #FAFECD

Accessibility & contrast

On white

1.13
#EFFB55 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

18.60
#EFFB55 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFB55
18.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##EFFB55#FFFFFF#000000##000000
##EFFB551.001.1318.6018.60
#FFFFFF1.131.0021.0021.00
#00000018.6021.001.001.00
##00000018.6021.001.001.00

Color blindness preview

Protanopia (red-blind)
#FFEF3C
Deuteranopia (green-blind)
#FFF361
Tritanopia (blue-blind)
#FEEDDA
Achromatopsia (no color)
#F1F1F1

Design tokens & code

CSS
--color: #effb55;
/* rgb */ color: rgb(239, 251, 85);
/* oklch */ color: oklch(95.0% 0.183 113.4);
Tailwind
colors: {
  custom: {
    50: '#f8fc8d',
    500: '#effb55',
    950: '#000000',
  },
}
SCSS
$custom: #effb55;
$custom-light: #f8fc8d;
$custom-dark: #000000;
JSON
{
  "hex": "#effb55",
  "rgb": {
    "r": 239,
    "g": 251,
    "b": 85
  },
  "hsl": {
    "h": 64.337,
    "s": 95.402,
    "l": 65.882
  },
  "oklch": {
    "l": 0.95007,
    "c": 0.18269,
    "h": 113.4
  },
  "luminance": 0.88001
}

Semantic roles & 50–950 ramp

primary
#EFFB55
secondary
#3429CC
accent
#00E611
background
#FFFFFC
surface
#FFFFF4
border
#D7D7CE
text
#18170D
muted
#86857F

Preview Lab

Preview with #EFFB55

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →

#EFFB55 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva