#51B4DC#51B4DC

#51B4DC is a light, moderate cyan. Relative luminance 0.396; OKLCH L 72.7% C 0.108 H 227.7°. Best body text is #000000 at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#51B4DC
RGB	rgb(81, 180, 220)
HSL	hsl(197, 67%, 59%)
HSV	hsv(197, 63%, 86%)
CMYK	cmyk(63.2%, 18.2%, 0%, 13.7%)
CIE-LAB	lab(69.15, -16.94, -28.72)
CIE-LCH	lch(69.15, 33.34, 239.47°)
OKLab	oklab(72.7% -0.073 -0.0802)
OKLCH	oklch(72.7% 0.108 227.7)
XYZ	xyz(32.6278, 39.5558, 73.6118)
Luminance	0.3956 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B4DC #DC7951

analogous

#51DCBF #51B4DC #516FDC

triadic

#51B4DC #DC51B4 #B4DC51

tetradic

#51B4DC #BF51DC #DC7951 #6FDC51

square

#51B4DC #BF51DC #DC7951 #6FDC51

split-complementary

#51B4DC #DC516F #DCBF51

monochromatic

#1E7395 #289AC8 #51B4DC #84CAE6 #B7E0F0

Accessibility & contrast

On white

2.36

#51B4DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.91

#51B4DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B4DC

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B4DC	#FFFFFF	#000000	##000000
##51B4DC	1.00	2.36	8.91	8.91
#FFFFFF	2.36	1.00	21.00	21.00
#000000	8.91	21.00	1.00	1.00
##000000	8.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FB1DE

Deuteranopia (green-blind)

#8BA3DC

Tritanopia (blue-blind)

#00BFC1

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #51b4dc;
/* rgb */ color: rgb(81, 180, 220);
/* oklch */ color: oklch(72.7% 0.108 227.7);

Tailwind

colors: {
  custom: {
    50: '#8fcae7',
    500: '#51b4dc',
    950: '#000000',
  },
}

SCSS

$custom: #51b4dc;
$custom-light: #8fcae7;
$custom-dark: #000000;

JSON

{
  "hex": "#51b4dc",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 220
  },
  "hsl": {
    "h": 197.266,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.72702,
    "c": 0.10845,
    "h": 227.7
  },
  "luminance": 0.39559
}

Semantic roles & 50–950 ramp

primary

#51B4DC

secondary

#E0B9A9

accent

#703EE9

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B4DC

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

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