#51B1E2#51B1E2

#51B1E2 is a light, moderate cyan. Relative luminance 0.387; OKLCH L 72.3% C 0.115 H 233.8°. Best body text is #000000 at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#51B1E2
RGB	rgb(81, 177, 226)
HSL	hsl(200, 71%, 60%)
HSV	hsv(200, 64%, 89%)
CMYK	cmyk(64.2%, 21.7%, 0%, 11.4%)
CIE-LAB	lab(68.52, -13.46, -32.98)
CIE-LCH	lch(68.52, 35.62, 247.79°)
OKLab	oklab(72.28% -0.0678 -0.0924)
OKLCH	oklch(72.28% 0.115 233.8)
XYZ	xyz(32.8376, 38.6812, 77.6724)
Luminance	0.3869 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B1E2 #E28251

analogous

#51E2CB #51B1E2 #5168E2

triadic

#51B1E2 #E251B1 #B1E251

tetradic

#51B1E2 #CB51E2 #E28251 #68E251

square

#51B1E2 #CB51E2 #E28251 #68E251

split-complementary

#51B1E2 #E25168 #E2CB51

monochromatic

#1A729E #2397D3 #51B1E2 #85C9EB #BAE0F3

Accessibility & contrast

On white

2.40

#51B1E2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.74

#51B1E2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B1E2

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B1E2	#FFFFFF	#000000	##000000
##51B1E2	1.00	2.40	8.74	8.74
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.74	21.00	1.00	1.00
##000000	8.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99AFE4

Deuteranopia (green-blind)

#85A1E1

Tritanopia (blue-blind)

#00BEC1

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #51b1e2;
/* rgb */ color: rgb(81, 177, 226);
/* oklch */ color: oklch(72.3% 0.115 233.8);

Tailwind

colors: {
  custom: {
    50: '#90c8eb',
    500: '#51b1e2',
    950: '#000000',
  },
}

SCSS

$custom: #51b1e2;
$custom-light: #90c8eb;
$custom-dark: #000000;

JSON

{
  "hex": "#51b1e2",
  "rgb": {
    "r": 81,
    "g": 177,
    "b": 226
  },
  "hsl": {
    "h": 200.276,
    "s": 71.429,
    "l": 60.196
  },
  "oklch": {
    "l": 0.72276,
    "c": 0.11462,
    "h": 233.8
  },
  "luminance": 0.38685
}

Semantic roles & 50–950 ramp

primary

#51B1E2

secondary

#E3BEAC

accent

#5312D3

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B1E2

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

Preview Lab → · Contrast checker → · Palette generator →