#51B2E6#51B2E6

#51B2E6 is a light, moderate cyan. Relative luminance 0.393; OKLCH L 72.7% C 0.118 H 235.1°. Best body text is #000000 at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#51B2E6
RGB	rgb(81, 178, 230)
HSL	hsl(201, 75%, 61%)
HSV	hsv(201, 65%, 90%)
CMYK	cmyk(64.8%, 22.6%, 0%, 9.8%)
CIE-LAB	lab(68.97, -12.73, -34.47)
CIE-LCH	lch(68.97, 36.75, 249.73°)
OKLab	oklab(72.69% -0.0674 -0.0967)
OKLCH	oklch(72.69% 0.118 235.1)
XYZ	xyz(33.5911, 39.2998, 80.6629)
Luminance	0.3930 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B2E6 #E68551

analogous

#51E6D0 #51B2E6 #5167E6

triadic

#51B2E6 #E651B2 #B2E651

tetradic

#51B2E6 #D051E6 #E68551 #67E651

square

#51B2E6 #D051E6 #E68551 #67E651

split-complementary

#51B2E6 #E65167 #E6D051

monochromatic

#1874A5 #1F99DA #51B2E6 #87CAEE #BCE1F5

Accessibility & contrast

On white

2.37

#51B2E6 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.86

#51B2E6 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2E6

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B2E6	#FFFFFF	#000000	##000000
##51B2E6	1.00	2.37	8.86	8.86
#FFFFFF	2.37	1.00	21.00	21.00
#000000	8.86	21.00	1.00	1.00
##000000	8.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99B1E8

Deuteranopia (green-blind)

#85A2E5

Tritanopia (blue-blind)

#00C0C3

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #51b2e6;
/* rgb */ color: rgb(81, 178, 230);
/* oklch */ color: oklch(72.7% 0.118 235.1);

Tailwind

colors: {
  custom: {
    50: '#90c9ee',
    500: '#51b2e6',
    950: '#000000',
  },
}

SCSS

$custom: #51b2e6;
$custom-light: #90c9ee;
$custom-dark: #000000;

JSON

{
  "hex": "#51b2e6",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 230
  },
  "hsl": {
    "h": 200.94,
    "s": 74.874,
    "l": 60.98
  },
  "oklch": {
    "l": 0.72685,
    "c": 0.1179,
    "h": 235.1
  },
  "luminance": 0.39303
}

Semantic roles & 50–950 ramp

primary

#51B2E6

secondary

#E5C1AD

accent

#540ED7

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B2E6

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

Preview Lab → · Contrast checker → · Palette generator →