#EFC63C#EFC63C

#EFC63C is a very light, vivid yellow. Relative luminance 0.591; OKLCH L 84.0% C 0.154 H 91.5°. Best body text is #000000 at 12.81:1 contrast (WCAG AA passes).

Color values

HEX	#EFC63C
RGB	rgb(239, 198, 60)
HSL	hsl(46, 85%, 59%)
HSV	hsv(46, 75%, 94%)
CMYK	cmyk(0%, 17.2%, 74.9%, 6.3%)
CIE-LAB	lab(81.33, 1.16, 70.11)
CIE-LCH	lch(81.33, 70.12, 89.05°)
OKLab	oklab(83.96% -0.0041 0.1538)
OKLCH	oklch(83.96% 0.154 91.5)
XYZ	xyz(56.6095, 59.0686, 12.6938)
Luminance	0.5907 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFC63C #3C65EF

analogous

#EF6C3C #EFC63C #BEEF3C

triadic

#EFC63C #3CEFC6 #C63CEF

tetradic

#EFC63C #3CEF6C #3C65EF #EF3CBE

square

#EFC63C #3CEF6C #3C65EF #EF3CBE

split-complementary

#EFC63C #3CBEEF #6C3CEF

monochromatic

#A3810D #DCAE12 #EFC63C #F4D775 #F8E7AD

Accessibility & contrast

On white

1.64

#EFC63C on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.81

#EFC63C on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFC63C

12.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFC63C	#FFFFFF	#000000	##000000
##EFC63C	1.00	1.64	12.81	12.81
#FFFFFF	1.64	1.00	21.00	21.00
#000000	12.81	21.00	1.00	1.00
##000000	12.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#DCC323

Deuteranopia (green-blind)

#E6CF44

Tritanopia (blue-blind)

#FFB5AB

Achromatopsia (no color)

#CACACA

Design tokens & code

CSS

--color: #efc63c;
/* rgb */ color: rgb(239, 198, 60);
/* oklch */ color: oklch(84.0% 0.154 91.5);

Tailwind

colors: {
  custom: {
    50: '#f9d67b',
    500: '#efc63c',
    950: '#000000',
  },
}

SCSS

$custom: #efc63c;
$custom-light: #f9d67b;
$custom-dark: #000000;

JSON

{
  "hex": "#efc63c",
  "rgb": {
    "r": 239,
    "g": 198,
    "b": 60
  },
  "hsl": {
    "h": 46.257,
    "s": 84.834,
    "l": 58.627
  },
  "oklch": {
    "l": 0.83956,
    "c": 0.15384,
    "h": 91.5
  },
  "luminance": 0.59065
}

Semantic roles & 50–950 ramp

primary

#EFC63C

secondary

#2A46A5

accent

#5CFB2D

background

#FFFEFB

surface

#FFFBF2

border

#D7D4CC

text

#18140A

muted

#86837D

Preview Lab

Preview with #EFC63C

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

Preview Lab → · Contrast checker → · Palette generator →