#51BFDA#51BFDA

#51BFDA is a light, moderate cyan. Relative luminance 0.441; OKLCH L 75.2% C 0.106 H 216.7°. Best body text is #000000 at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#51BFDA
RGB	rgb(81, 191, 218)
HSL	hsl(192, 65%, 59%)
HSV	hsv(192, 63%, 85%)
CMYK	cmyk(62.8%, 12.4%, 0%, 14.5%)
CIE-LAB	lab(72.27, -23.23, -22.84)
CIE-LCH	lch(72.27, 32.58, 224.52°)
OKLab	oklab(75.18% -0.0851 -0.0635)
OKLCH	oklch(75.18% 0.106 216.7)
XYZ	xyz(34.6739, 44.0692, 72.9949)
Luminance	0.4407 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BFDA #DA6C51

analogous

#51DAB0 #51BFDA #517ADA

triadic

#51BFDA #DA51BF #BFDA51

tetradic

#51BFDA #B051DA #DA6C51 #7ADA51

square

#51BFDA #B051DA #DA6C51 #7ADA51

split-complementary

#51BFDA #DA517A #DAB051

monochromatic

#1F7B92 #2AA6C4 #51BFDA #83D2E5 #B6E4EF

Accessibility & contrast

On white

2.14

#51BFDA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.81

#51BFDA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BFDA

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BFDA	#FFFFFF	#000000	##000000
##51BFDA	1.00	2.14	9.81	9.81
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.81	21.00	1.00	1.00
##000000	9.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADBADC

Deuteranopia (green-blind)

#99ABDA

Tritanopia (blue-blind)

#00C9C7

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bfda;
/* rgb */ color: rgb(81, 191, 218);
/* oklch */ color: oklch(75.2% 0.106 216.7);

Tailwind

colors: {
  custom: {
    50: '#90d2e5',
    500: '#51bfda',
    950: '#000000',
  },
}

SCSS

$custom: #51bfda;
$custom-light: #90d2e5;
$custom-dark: #000000;

JSON

{
  "hex": "#51bfda",
  "rgb": {
    "r": 81,
    "g": 191,
    "b": 218
  },
  "hsl": {
    "h": 191.825,
    "s": 64.929,
    "l": 58.627
  },
  "oklch": {
    "l": 0.75178,
    "c": 0.1062,
    "h": 216.7
  },
  "luminance": 0.44073
}

Semantic roles & 50–950 ramp

primary

#51BFDA

secondary

#DEB3A8

accent

#6140E8

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1415

muted

#7E8284

Preview Lab

Preview with #51BFDA

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

Preview Lab → · Contrast checker → · Palette generator →