#51C3E9#51C3E9

#51C3E9 is a light, moderate cyan. Relative luminance 0.467; OKLCH L 76.7% C 0.115 H 223.5°. Best body text is #000000 at 10.33:1 contrast (WCAG AA passes).

Color values

HEX	#51C3E9
RGB	rgb(81, 195, 233)
HSL	hsl(195, 78%, 62%)
HSV	hsv(195, 65%, 91%)
CMYK	cmyk(65.2%, 16.3%, 0%, 8.6%)
CIE-LAB	lab(73.97, -20.73, -28.38)
CIE-LCH	lch(73.97, 35.14, 233.86°)
OKLab	oklab(76.72% -0.0835 -0.0792)
OKLCH	oklch(76.72% 0.115 223.5)
XYZ	xyz(37.6105, 46.6587, 84.0989)
Luminance	0.4666 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C3E9 #E97751

analogous

#51E9C3 #51C3E9 #5177E9

triadic

#51C3E9 #E951C3 #C3E951

tetradic

#51C3E9 #C351E9 #E97751 #77E951

square

#51C3E9 #C351E9 #E97751 #77E951

split-complementary

#51C3E9 #E95177 #E9C351

monochromatic

#1685AA #1CAFE0 #51C3E9 #87D6F0 #BEE8F7

Accessibility & contrast

On white

2.03

#51C3E9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.33

#51C3E9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C3E9

10.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C3E9	#FFFFFF	#000000	##000000
##51C3E9	1.00	2.03	10.33	10.33
#FFFFFF	2.03	1.00	21.00	21.00
#000000	10.33	21.00	1.00	1.00
##000000	10.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADBFEB

Deuteranopia (green-blind)

#98AFE9

Tritanopia (blue-blind)

#00CFCF

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #51c3e9;
/* rgb */ color: rgb(81, 195, 233);
/* oklch */ color: oklch(76.7% 0.115 223.5);

Tailwind

colors: {
  custom: {
    50: '#92d5f0',
    500: '#51c3e9',
    950: '#000000',
  },
}

SCSS

$custom: #51c3e9;
$custom-light: #92d5f0;
$custom-dark: #000000;

JSON

{
  "hex": "#51c3e9",
  "rgb": {
    "r": 81,
    "g": 195,
    "b": 233
  },
  "hsl": {
    "h": 195,
    "s": 77.551,
    "l": 61.569
  },
  "oklch": {
    "l": 0.76715,
    "c": 0.11511,
    "h": 223.5
  },
  "luminance": 0.46663
}

Semantic roles & 50–950 ramp

primary

#51C3E9

secondary

#E7BDAF

accent

#3F0CDA

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C3E9

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

Preview Lab → · Contrast checker → · Palette generator →