#51BEEE#51BEEE

#51BEEE is a light, vivid cyan. Relative luminance 0.447; OKLCH L 75.8% C 0.120 H 230.3°. Best body text is #000000 at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#51BEEE
RGB	rgb(81, 190, 238)
HSL	hsl(198, 82%, 63%)
HSV	hsv(198, 66%, 93%)
CMYK	cmyk(66%, 20.2%, 0%, 6.7%)
CIE-LAB	lab(72.72, -16.58, -33.00)
CIE-LCH	lch(72.72, 36.94, 243.32°)
OKLab	oklab(75.78% -0.0767 -0.0924)
OKLCH	oklch(75.78% 0.12 230.3)
XYZ	xyz(37.2333, 44.7453, 87.5468)
Luminance	0.4475 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BEEE #EE8151

analogous

#51EED0 #51BEEE #516FEE

triadic

#51BEEE #EE51BE #BEEE51

tetradic

#51BEEE #D051EE #EE8151 #6FEE51

square

#51BEEE #D051EE #EE8151 #6FEE51

split-complementary

#51BEEE #EE516F #EED051

monochromatic

#1182B3 #19A9E9 #51BEEE #89D3F3 #C1E8F9

Accessibility & contrast

On white

2.11

#51BEEE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.95

#51BEEE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BEEE

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BEEE	#FFFFFF	#000000	##000000
##51BEEE	1.00	2.11	9.95	9.95
#FFFFFF	2.11	1.00	21.00	21.00
#000000	9.95	21.00	1.00	1.00
##000000	9.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A6BBF0

Deuteranopia (green-blind)

#90ABED

Tritanopia (blue-blind)

#00CBCE

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51beee;
/* rgb */ color: rgb(81, 190, 238);
/* oklch */ color: oklch(75.8% 0.120 230.3);

Tailwind

colors: {
  custom: {
    50: '#92d1f3',
    500: '#51beee',
    950: '#000000',
  },
}

SCSS

$custom: #51beee;
$custom-light: #92d1f3;
$custom-dark: #000000;

JSON

{
  "hex": "#51beee",
  "rgb": {
    "r": 81,
    "g": 190,
    "b": 238
  },
  "hsl": {
    "h": 198.344,
    "s": 82.199,
    "l": 62.549
  },
  "oklch": {
    "l": 0.75781,
    "c": 0.12013,
    "h": 230.3
  },
  "luminance": 0.44749
}

Semantic roles & 50–950 ramp

primary

#51BEEE

secondary

#EAC2B1

accent

#4907DF

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1417

muted

#7E8285

Preview Lab

Preview with #51BEEE

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

Preview Lab → · Contrast checker → · Palette generator →