#51BAE4#51BAE4

#51BAE4 is a light, moderate cyan. Relative luminance 0.425; OKLCH L 74.4% C 0.113 H 227.7°. Best body text is #000000 at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#51BAE4
RGB	rgb(81, 186, 228)
HSL	hsl(197, 73%, 61%)
HSV	hsv(197, 64%, 89%)
CMYK	cmyk(64.5%, 18.4%, 0%, 10.6%)
CIE-LAB	lab(71.19, -17.61, -29.95)
CIE-LCH	lch(71.19, 34.74, 239.55°)
OKLab	oklab(74.43% -0.0762 -0.0837)
OKLCH	oklch(74.43% 0.113 227.7)
XYZ	xyz(34.9503, 42.4649, 79.7384)
Luminance	0.4247 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BAE4 #E47B51

analogous

#51E4C4 #51BAE4 #5170E4

triadic

#51BAE4 #E451BA #BAE451

tetradic

#51BAE4 #C451E4 #E47B51 #70E451

square

#51BAE4 #C451E4 #E47B51 #70E451

split-complementary

#51BAE4 #E45170 #E4C451

monochromatic

#197BA2 #21A3D7 #51BAE4 #86CFEC #BBE4F4

Accessibility & contrast

On white

2.21

#51BAE4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.49

#51BAE4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BAE4

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BAE4	#FFFFFF	#000000	##000000
##51BAE4	1.00	2.21	9.49	9.49
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.49	21.00	1.00	1.00
##000000	9.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B7E6

Deuteranopia (green-blind)

#8FA8E3

Tritanopia (blue-blind)

#00C6C8

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51bae4;
/* rgb */ color: rgb(81, 186, 228);
/* oklch */ color: oklch(74.4% 0.113 227.7);

Tailwind

colors: {
  custom: {
    50: '#91ceec',
    500: '#51bae4',
    950: '#000000',
  },
}

SCSS

$custom: #51bae4;
$custom-light: #91ceec;
$custom-dark: #000000;

JSON

{
  "hex": "#51bae4",
  "rgb": {
    "r": 81,
    "g": 186,
    "b": 228
  },
  "hsl": {
    "h": 197.143,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.7443,
    "c": 0.11323,
    "h": 227.7
  },
  "luminance": 0.42469
}

Semantic roles & 50–950 ramp

primary

#51BAE4

secondary

#E4BCAC

accent

#4910D5

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51BAE4

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

Preview Lab → · Contrast checker → · Palette generator →