#51C8E5#51C8E5

#51C8E5 is a light, moderate cyan. Relative luminance 0.487; OKLCH L 77.7% C 0.113 H 216.8°. Best body text is #000000 at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#51C8E5
RGB	rgb(81, 200, 229)
HSL	hsl(192, 74%, 61%)
HSV	hsv(192, 65%, 90%)
CMYK	cmyk(64.6%, 12.7%, 0%, 10.2%)
CIE-LAB	lab(75.27, -24.47, -24.23)
CIE-LCH	lch(75.27, 34.44, 224.72°)
OKLab	oklab(77.71% -0.0901 -0.0674)
OKLCH	oklch(77.71% 0.113 216.8)
XYZ	xyz(38.1847, 48.7109, 81.5033)
Luminance	0.4872 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C8E5 #E56E51

analogous

#51E5B8 #51C8E5 #517EE5

triadic

#51C8E5 #E551C8 #C8E551

tetradic

#51C8E5 #B851E5 #E56E51 #7EE551

square

#51C8E5 #B851E5 #E56E51 #7EE551

split-complementary

#51C8E5 #E5517E #E5B851

monochromatic

#1888A3 #20B4D8 #51C8E5 #86D9ED #BBEAF5

Accessibility & contrast

On white

1.95

#51C8E5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.74

#51C8E5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C8E5

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C8E5	#FFFFFF	#000000	##000000
##51C8E5	1.00	1.95	10.74	10.74
#FFFFFF	1.95	1.00	21.00	21.00
#000000	10.74	21.00	1.00	1.00
##000000	10.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B5C2E7

Deuteranopia (green-blind)

#9FB3E5

Tritanopia (blue-blind)

#00D2D1

Achromatopsia (no color)

#B9B9B9

Design tokens & code

CSS

--color: #51c8e5;
/* rgb */ color: rgb(81, 200, 229);
/* oklch */ color: oklch(77.7% 0.113 216.8);

Tailwind

colors: {
  custom: {
    50: '#92d9ed',
    500: '#51c8e5',
    950: '#000000',
  },
}

SCSS

$custom: #51c8e5;
$custom-light: #92d9ed;
$custom-dark: #000000;

JSON

{
  "hex": "#51c8e5",
  "rgb": {
    "r": 81,
    "g": 200,
    "b": 229
  },
  "hsl": {
    "h": 191.757,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.7771,
    "c": 0.11251,
    "h": 216.8
  },
  "luminance": 0.48715
}

Semantic roles & 50–950 ramp

primary

#51C8E5

secondary

#E5B8AD

accent

#360FD6

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C8E5

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

Preview Lab → · Contrast checker → · Palette generator →