#EFC33C#EFC33C

#EFC33C is a very light, vivid yellow. Relative luminance 0.577; OKLCH L 83.4% C 0.152 H 89.9°. Best body text is #000000 at 12.54:1 contrast (WCAG AA passes).

Color values

HEX	#EFC33C
RGB	rgb(239, 195, 60)
HSL	hsl(45, 85%, 59%)
HSV	hsv(45, 75%, 94%)
CMYK	cmyk(0%, 18.4%, 74.9%, 6.3%)
CIE-LAB	lab(80.58, 2.71, 69.39)
CIE-LCH	lch(80.58, 69.45, 87.76°)
OKLab	oklab(83.36% 0.0003 0.1523)
OKLCH	oklch(83.36% 0.152 89.9)
XYZ	xyz(55.9306, 57.7108, 12.4675)
Luminance	0.5771 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFC33C #3C68EF

analogous

#EF693C #EFC33C #C2EF3C

triadic

#EFC33C #3CEFC3 #C33CEF

tetradic

#EFC33C #3CEF69 #3C68EF #EF3CC2

square

#EFC33C #3CEF69 #3C68EF #EF3CC2

split-complementary

#EFC33C #3CC2EF #693CEF

monochromatic

#A37E0D #DCAA12 #EFC33C #F4D475 #F8E6AD

Accessibility & contrast

On white

1.67

#EFC33C on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.54

#EFC33C on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFC33C

12.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFC33C	#FFFFFF	#000000	##000000
##EFC33C	1.00	1.67	12.54	12.54
#FFFFFF	1.67	1.00	21.00	21.00
#000000	12.54	21.00	1.00	1.00
##000000	12.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D9C124

Deuteranopia (green-blind)

#E4CD44

Tritanopia (blue-blind)

#FFB2A9

Achromatopsia (no color)

#C8C8C8

Design tokens & code

CSS

--color: #efc33c;
/* rgb */ color: rgb(239, 195, 60);
/* oklch */ color: oklch(83.4% 0.152 89.9);

Tailwind

colors: {
  custom: {
    50: '#f9d47b',
    500: '#efc33c',
    950: '#000000',
  },
}

SCSS

$custom: #efc33c;
$custom-light: #f9d47b;
$custom-dark: #000000;

JSON

{
  "hex": "#efc33c",
  "rgb": {
    "r": 239,
    "g": 195,
    "b": 60
  },
  "hsl": {
    "h": 45.251,
    "s": 84.834,
    "l": 58.627
  },
  "oklch": {
    "l": 0.83363,
    "c": 0.15227,
    "h": 89.9
  },
  "luminance": 0.57707
}

Semantic roles & 50–950 ramp

primary

#EFC33C

secondary

#2A48A5

accent

#5FFB2D

background

#FFFEFB

surface

#FFFBF2

border

#D7D4CC

text

#18140A

muted

#86837D

Preview Lab

Preview with #EFC33C

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

Preview Lab → · Contrast checker → · Palette generator →