#51C4E3#51C4E3

#51C4E3 is a light, moderate cyan. Relative luminance 0.468; OKLCH L 76.7% C 0.111 H 218.8°. Best body text is #000000 at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#51C4E3
RGB	rgb(81, 196, 227)
HSL	hsl(193, 72%, 60%)
HSV	hsv(193, 64%, 89%)
CMYK	cmyk(64.3%, 13.7%, 0%, 11%)
CIE-LAB	lab(74.04, -23.06, -25.03)
CIE-LCH	lch(74.04, 34.03, 227.34°)
OKLab	oklab(76.7% -0.0868 -0.0697)
OKLCH	oklch(76.7% 0.111 218.8)
XYZ	xyz(36.9927, 46.7713, 79.7363)
Luminance	0.4677 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C4E3 #E37051

analogous

#51E3B9 #51C4E3 #517BE3

triadic

#51C4E3 #E351C4 #C4E351

tetradic

#51C4E3 #B951E3 #E37051 #7BE351

square

#51C4E3 #B951E3 #E37051 #7BE351

split-complementary

#51C4E3 #E3517B #E3B951

monochromatic

#1A83A0 #22AFD5 #51C4E3 #86D6EB #BAE8F4

Accessibility & contrast

On white

2.03

#51C4E3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.36

#51C4E3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4E3

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C4E3	#FFFFFF	#000000	##000000
##51C4E3	1.00	2.03	10.36	10.36
#FFFFFF	2.03	1.00	21.00	21.00
#000000	10.36	21.00	1.00	1.00
##000000	10.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B0BFE5

Deuteranopia (green-blind)

#9CAFE3

Tritanopia (blue-blind)

#00CFCE

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #51c4e3;
/* rgb */ color: rgb(81, 196, 227);
/* oklch */ color: oklch(76.7% 0.111 218.8);

Tailwind

colors: {
  custom: {
    50: '#91d6eb',
    500: '#51c4e3',
    950: '#000000',
  },
}

SCSS

$custom: #51c4e3;
$custom-light: #91d6eb;
$custom-dark: #000000;

JSON

{
  "hex": "#51c4e3",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 227
  },
  "hsl": {
    "h": 192.74,
    "s": 72.277,
    "l": 60.392
  },
  "oklch": {
    "l": 0.76701,
    "c": 0.11129,
    "h": 218.8
  },
  "luminance": 0.46775
}

Semantic roles & 50–950 ramp

primary

#51C4E3

secondary

#E4B8AC

accent

#3B11D4

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C4E3

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

Preview Lab → · Contrast checker → · Palette generator →