#51BBE3#51BBE3

#51BBE3 is a light, moderate cyan. Relative luminance 0.428; OKLCH L 74.6% C 0.112 H 226.2°. Best body text is #000000 at 9.57:1 contrast (WCAG AA passes).

Color values

HEX	#51BBE3
RGB	rgb(81, 187, 227)
HSL	hsl(196, 72%, 60%)
HSV	hsv(196, 64%, 89%)
CMYK	cmyk(64.3%, 17.6%, 0%, 11%)
CIE-LAB	lab(71.44, -18.44, -29.02)
CIE-LCH	lch(71.44, 34.38, 237.56°)
OKLab	oklab(74.62% -0.0776 -0.081)
OKLCH	oklch(74.62% 0.112 226.2)
XYZ	xyz(35.0233, 42.8323, 79.0798)
Luminance	0.4284 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBE3 #E37951

analogous

#51E3C2 #51BBE3 #5172E3

triadic

#51BBE3 #E351BB #BBE351

tetradic

#51BBE3 #C251E3 #E37951 #72E351

square

#51BBE3 #C251E3 #E37951 #72E351

split-complementary

#51BBE3 #E35172 #E3C251

monochromatic

#1A7BA0 #22A4D5 #51BBE3 #86D0EB #BAE4F4

Accessibility & contrast

On white

2.19

#51BBE3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.57

#51BBE3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBE3

9.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBE3	#FFFFFF	#000000	##000000
##51BBE3	1.00	2.19	9.57	9.57
#FFFFFF	2.19	1.00	21.00	21.00
#000000	9.57	21.00	1.00	1.00
##000000	9.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B7E5

Deuteranopia (green-blind)

#91A8E3

Tritanopia (blue-blind)

#00C7C8

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #51bbe3;
/* rgb */ color: rgb(81, 187, 227);
/* oklch */ color: oklch(74.6% 0.112 226.2);

Tailwind

colors: {
  custom: {
    50: '#90cfec',
    500: '#51bbe3',
    950: '#000000',
  },
}

SCSS

$custom: #51bbe3;
$custom-light: #90cfec;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbe3",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 227
  },
  "hsl": {
    "h": 196.438,
    "s": 72.277,
    "l": 60.392
  },
  "oklch": {
    "l": 0.74618,
    "c": 0.11222,
    "h": 226.2
  },
  "luminance": 0.42836
}

Semantic roles & 50–950 ramp

primary

#51BBE3

secondary

#E4BBAC

accent

#4711D4

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51BBE3

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

Preview Lab → · Contrast checker → · Palette generator →