#EFCF34#EFCF34

#EFCF34 is a very light, vivid yellow. Relative luminance 0.632; OKLCH L 85.7% C 0.163 H 96.6°. Best body text is #000000 at 13.64:1 contrast (WCAG AA passes).

Color values

HEX	#EFCF34
RGB	rgb(239, 207, 52)
HSL	hsl(50, 85%, 57%)
HSV	hsv(50, 78%, 94%)
CMYK	cmyk(0%, 13.4%, 78.2%, 6.3%)
CIE-LAB	lab(83.56, -3.75, 74.80)
CIE-LCH	lch(83.56, 74.89, 92.87°)
OKLab	oklab(85.71% -0.0189 0.1623)
OKLCH	oklch(85.71% 0.163 96.6)
XYZ	xyz(58.5324, 63.2275, 12.3693)
Luminance	0.6322 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFCF34 #3454EF

analogous

#EF7234 #EFCF34 #B1EF34

triadic

#EFCF34 #34EFCF #CF34EF

tetradic

#EFCF34 #34EF72 #3454EF #EF34B1

square

#EFCF34 #34EF72 #3454EF #EF34B1

split-complementary

#EFCF34 #34B1EF #7234EF

monochromatic

#9C840C #D5B311 #EFCF34 #F3DC6D #F8EAA5

Accessibility & contrast

On white

1.54

#EFCF34 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

13.64

#EFCF34 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFCF34

13.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFCF34	#FFFFFF	#000000	##000000
##EFCF34	1.00	1.54	13.64	13.64
#FFFFFF	1.54	1.00	21.00	21.00
#000000	13.64	21.00	1.00	1.00
##000000	13.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#E5CA09

Deuteranopia (green-blind)

#EDD53F

Tritanopia (blue-blind)

#FFBFB2

Achromatopsia (no color)

#D0D0D0

Design tokens & code

CSS

--color: #efcf34;
/* rgb */ color: rgb(239, 207, 52);
/* oklch */ color: oklch(85.7% 0.163 96.6);

Tailwind

colors: {
  custom: {
    50: '#f9dd78',
    500: '#efcf34',
    950: '#000000',
  },
}

SCSS

$custom: #efcf34;
$custom-light: #f9dd78;
$custom-dark: #000000;

JSON

{
  "hex": "#efcf34",
  "rgb": {
    "r": 239,
    "g": 207,
    "b": 52
  },
  "hsl": {
    "h": 49.733,
    "s": 85.388,
    "l": 57.059
  },
  "oklch": {
    "l": 0.85707,
    "c": 0.16334,
    "h": 96.6
  },
  "luminance": 0.63224
}

Semantic roles & 50–950 ramp

primary

#EFCF34

secondary

#283C9F

accent

#50FC2C

background

#FFFEFB

surface

#FFFCF2

border

#D7D5CC

text

#18150A

muted

#86847D

Preview Lab

Preview with #EFCF34

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

Preview Lab → · Contrast checker → · Palette generator →