#51C7E9#51C7E9

#51C7E9 is a light, moderate cyan. Relative luminance 0.485; OKLCH L 77.6% C 0.115 H 220.3°. Best body text is #000000 at 10.70:1 contrast (WCAG AA passes).

Color values

HEX	#51C7E9
RGB	rgb(81, 199, 233)
HSL	hsl(193, 78%, 62%)
HSV	hsv(193, 65%, 91%)
CMYK	cmyk(65.2%, 14.6%, 0%, 8.6%)
CIE-LAB	lab(75.12, -22.76, -26.61)
CIE-LCH	lch(75.12, 35.02, 229.46°)
OKLab	oklab(77.64% -0.0875 -0.0742)
OKLCH	oklch(77.64% 0.115 220.3)
XYZ	xyz(38.5187, 48.4752, 84.4016)
Luminance	0.4848 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C7E9 #E97351

analogous

#51E9BF #51C7E9 #517BE9

triadic

#51C7E9 #E951C7 #C7E951

tetradic

#51C7E9 #BF51E9 #E97351 #7BE951

square

#51C7E9 #BF51E9 #E97351 #7BE951

split-complementary

#51C7E9 #E9517B #E9BF51

monochromatic

#1689AA #1CB5E0 #51C7E9 #87D8F0 #BEEAF7

Accessibility & contrast

On white

1.96

#51C7E9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.70

#51C7E9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C7E9

10.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C7E9	#FFFFFF	#000000	##000000
##51C7E9	1.00	1.96	10.70	10.70
#FFFFFF	1.96	1.00	21.00	21.00
#000000	10.70	21.00	1.00	1.00
##000000	10.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B2C2EB

Deuteranopia (green-blind)

#9DB2E9

Tritanopia (blue-blind)

#00D2D2

Achromatopsia (no color)

#B9B9B9

Design tokens & code

CSS

--color: #51c7e9;
/* rgb */ color: rgb(81, 199, 233);
/* oklch */ color: oklch(77.6% 0.115 220.3);

Tailwind

colors: {
  custom: {
    50: '#92d8f0',
    500: '#51c7e9',
    950: '#000000',
  },
}

SCSS

$custom: #51c7e9;
$custom-light: #92d8f0;
$custom-dark: #000000;

JSON

{
  "hex": "#51c7e9",
  "rgb": {
    "r": 81,
    "g": 199,
    "b": 233
  },
  "hsl": {
    "h": 193.421,
    "s": 77.551,
    "l": 61.569
  },
  "oklch": {
    "l": 0.77638,
    "c": 0.11474,
    "h": 220.3
  },
  "luminance": 0.48479
}

Semantic roles & 50–950 ramp

primary

#51C7E9

secondary

#E7BBAF

accent

#3A0CDA

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C7E9

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

Preview Lab → · Contrast checker → · Palette generator →