#EFFF65#EFFF65

#EFFF65 is a very light, vivid yellow. Relative luminance 0.908; OKLCH L 96.0% C 0.176 H 114.8°. Best body text is #000000 at 19.16:1 contrast (WCAG AA passes).

Color values

HEX	#EFFF65
RGB	rgb(239, 255, 101)
HSL	hsl(66, 100%, 70%)
HSV	hsv(66, 60%, 100%)
CMYK	cmyk(6.3%, 0%, 60.4%, 0%)
CIE-LAB	lab(96.33, -24.82, 69.67)
CIE-LCH	lch(96.33, 73.96, 109.61°)
OKLab	oklab(95.98% -0.0735 0.1594)
OKLCH	oklch(95.98% 0.176 114.8)
XYZ	xyz(73.7072, 90.8115, 25.9549)
Luminance	0.9081 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFF65 #7565FF

analogous

#FFC265 #EFFF65 #A2FF65

triadic

#EFFF65 #65EFFF #FF65EF

tetradic

#EFFF65 #65FFC2 #7565FF #FF65A2

square

#EFFF65 #65FFC2 #7565FF #FF65A2

split-complementary

#EFFF65 #65A2FF #C265FF

monochromatic

#D1EA00 #E9FF28 #EFFF65 #F5FFA2 #FCFFDF

Accessibility & contrast

On white

1.10

#EFFF65 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.16

#EFFF65 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFF65

19.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFF65	#FFFFFF	#000000	##000000
##EFFF65	1.00	1.10	19.16	19.16
#FFFFFF	1.10	1.00	21.00	21.00
#000000	19.16	21.00	1.00	1.00
##000000	19.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF353

Deuteranopia (green-blind)

#FFF66F

Tritanopia (blue-blind)

#FDF1DF

Achromatopsia (no color)

#F4F4F4

Design tokens & code

CSS

--color: #efff65;
/* rgb */ color: rgb(239, 255, 101);
/* oklch */ color: oklch(96.0% 0.176 114.8);

Tailwind

colors: {
  custom: {
    50: '#f7ff97',
    500: '#efff65',
    950: '#000000',
  },
}

SCSS

$custom: #efff65;
$custom-light: #f7ff97;
$custom-dark: #000000;

JSON

{
  "hex": "#efff65",
  "rgb": {
    "r": 239,
    "g": 255,
    "b": 101
  },
  "hsl": {
    "h": 66.234,
    "s": 100,
    "l": 69.804
  },
  "oklch": {
    "l": 0.95982,
    "c": 0.17554,
    "h": 114.8
  },
  "luminance": 0.9081
}

Semantic roles & 50–950 ramp

primary

#EFFF65

secondary

#402EDA

accent

#00E618

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFFF65

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

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