#51C7E5#51C7E5

#51C7E5 is a light, moderate cyan. Relative luminance 0.483; OKLCH L 77.5% C 0.112 H 217.6°. Best body text is #000000 at 10.65:1 contrast (WCAG AA passes).

Color values

HEX	#51C7E5
RGB	rgb(81, 199, 229)
HSL	hsl(192, 74%, 61%)
HSV	hsv(192, 65%, 90%)
CMYK	cmyk(64.6%, 13.1%, 0%, 10.2%)
CIE-LAB	lab(74.98, -23.97, -24.67)
CIE-LCH	lch(74.98, 34.40, 225.83°)
OKLab	oklab(77.48% -0.089 -0.0687)
OKLCH	oklch(77.48% 0.112 217.6)
XYZ	xyz(37.9538, 48.2492, 81.4264)
Luminance	0.4825 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C7E5 #E56F51

analogous

#51E5B9 #51C7E5 #517DE5

triadic

#51C7E5 #E551C7 #C7E551

tetradic

#51C7E5 #B951E5 #E56F51 #7DE551

square

#51C7E5 #B951E5 #E56F51 #7DE551

split-complementary

#51C7E5 #E5517D #E5B951

monochromatic

#1887A3 #20B3D8 #51C7E5 #86D8ED #BBE9F5

Accessibility & contrast

On white

1.97

#51C7E5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.65

#51C7E5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C7E5

10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C7E5	#FFFFFF	#000000	##000000
##51C7E5	1.00	1.97	10.65	10.65
#FFFFFF	1.97	1.00	21.00	21.00
#000000	10.65	21.00	1.00	1.00
##000000	10.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B3C1E7

Deuteranopia (green-blind)

#9EB2E5

Tritanopia (blue-blind)

#00D1D0

Achromatopsia (no color)

#B9B9B9

Design tokens & code

CSS

--color: #51c7e5;
/* rgb */ color: rgb(81, 199, 229);
/* oklch */ color: oklch(77.5% 0.112 217.6);

Tailwind

colors: {
  custom: {
    50: '#91d8ed',
    500: '#51c7e5',
    950: '#000000',
  },
}

SCSS

$custom: #51c7e5;
$custom-light: #91d8ed;
$custom-dark: #000000;

JSON

{
  "hex": "#51c7e5",
  "rgb": {
    "r": 81,
    "g": 199,
    "b": 229
  },
  "hsl": {
    "h": 192.162,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.77478,
    "c": 0.11246,
    "h": 217.6
  },
  "luminance": 0.48253
}

Semantic roles & 50–950 ramp

primary

#51C7E5

secondary

#E5B8AD

accent

#380FD6

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C7E5

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

Preview Lab → · Contrast checker → · Palette generator →