#FFFF51#FFFF51

#FFFF51 is a very light, vivid yellow. Relative luminance 0.934; OKLCH L 97.1% C 0.186 H 109.4°. Best body text is #000000 at 19.67:1 contrast (WCAG AA passes).

Color values

HEX	#FFFF51
RGB	rgb(255, 255, 81)
HSL	hsl(60, 100%, 66%)
HSV	hsv(60, 68%, 100%)
CMYK	cmyk(0%, 0%, 68.2%, 0%)
CIE-LAB	lab(97.38, -19.62, 78.71)
CIE-LCH	lch(97.38, 81.12, 103.99°)
OKLab	oklab(97.07% -0.0617 0.1752)
OKLCH	oklch(97.07% 0.186 109.4)
XYZ	xyz(78.4879, 93.3764, 21.6719)
Luminance	0.9337 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#FFFF51 #5151FF

analogous

#FFA851 #FFFF51 #A8FF51

triadic

#FFFF51 #51FFFF #FF51FF

tetradic

#FFFF51 #51FFA8 #5151FF #FF51A8

square

#FFFF51 #51FFA8 #5151FF #FF51A8

split-complementary

#FFFF51 #51A8FF #A851FF

monochromatic

#D6D600 #FFFF14 #FFFF51 #FFFF8E #FFFFCB

Accessibility & contrast

On white

1.07

#FFFF51 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.67

#FFFF51 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #FFFF51

19.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##FFFF51	#FFFFFF	#000000	##000000
##FFFF51	1.00	1.07	19.67	19.67
#FFFFFF	1.07	1.00	21.00	21.00
#000000	19.67	21.00	1.00	1.00
##000000	19.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF534

Deuteranopia (green-blind)

#FFFA5E

Tritanopia (blue-blind)

#FFEFDD

Achromatopsia (no color)

#F7F7F7

Design tokens & code

CSS

--color: #ffff51;
/* rgb */ color: rgb(255, 255, 81);
/* oklch */ color: oklch(97.1% 0.186 109.4);

Tailwind

colors: {
  custom: {
    50: '#ffff8c',
    500: '#ffff51',
    950: '#000000',
  },
}

SCSS

$custom: #ffff51;
$custom-light: #ffff8c;
$custom-dark: #000000;

JSON

{
  "hex": "#ffff51",
  "rgb": {
    "r": 255,
    "g": 255,
    "b": 81
  },
  "hsl": {
    "h": 60,
    "s": 100,
    "l": 65.882
  },
  "oklch": {
    "l": 0.97067,
    "c": 0.18571,
    "h": 109.4
  },
  "luminance": 0.93374
}

Semantic roles & 50–950 ramp

primary

#FFFF51

secondary

#2525D0

accent

#00E600

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#19170D

muted

#87857F

Preview Lab

Preview with #FFFF51

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

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