#51C4E0#51C4E0

#51C4E0 is a light, moderate cyan. Relative luminance 0.466; OKLCH L 76.6% C 0.110 H 216.7°. Best body text is #000000 at 10.32:1 contrast (WCAG AA passes).

Color values

HEX	#51C4E0
RGB	rgb(81, 196, 224)
HSL	hsl(192, 70%, 60%)
HSV	hsv(192, 64%, 88%)
CMYK	cmyk(63.8%, 12.5%, 0%, 12.2%)
CIE-LAB	lab(73.94, -23.96, -23.56)
CIE-LCH	lch(73.94, 33.60, 224.52°)
OKLab	oklab(76.58% -0.0879 -0.0655)
OKLCH	oklch(76.58% 0.11 216.7)
XYZ	xyz(36.5823, 46.6071, 77.5747)
Luminance	0.4661 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C4E0 #E06D51

analogous

#51E0B4 #51C4E0 #517DE0

triadic

#51C4E0 #E051C4 #C4E051

tetradic

#51C4E0 #B451E0 #E06D51 #7DE051

square

#51C4E0 #B451E0 #E06D51 #7DE051

split-complementary

#51C4E0 #E0517D #E0B451

monochromatic

#1C829B #25AECF #51C4E0 #85D6E9 #B9E7F3

Accessibility & contrast

On white

2.03

#51C4E0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.32

#51C4E0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4E0

10.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C4E0	#FFFFFF	#000000	##000000
##51C4E0	1.00	2.03	10.32	10.32
#FFFFFF	2.03	1.00	21.00	21.00
#000000	10.32	21.00	1.00	1.00
##000000	10.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B1BEE2

Deuteranopia (green-blind)

#9DAFE0

Tritanopia (blue-blind)

#00CECD

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #51c4e0;
/* rgb */ color: rgb(81, 196, 224);
/* oklch */ color: oklch(76.6% 0.110 216.7);

Tailwind

colors: {
  custom: {
    50: '#91d6e9',
    500: '#51c4e0',
    950: '#000000',
  },
}

SCSS

$custom: #51c4e0;
$custom-light: #91d6e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51c4e0",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 224
  },
  "hsl": {
    "h": 191.748,
    "s": 69.756,
    "l": 59.804
  },
  "oklch": {
    "l": 0.76582,
    "c": 0.10967,
    "h": 216.7
  },
  "luminance": 0.46611
}

Semantic roles & 50–950 ramp

primary

#51C4E0

secondary

#E2B6AB

accent

#5E3BED

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C4E0

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

Preview Lab → · Contrast checker → · Palette generator →