#51B0DC#51B0DC

#51B0DC is a light, moderate cyan. Relative luminance 0.380; OKLCH L 71.8% C 0.110 H 231.1°. Best body text is #000000 at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#51B0DC
RGB	rgb(81, 176, 220)
HSL	hsl(199, 67%, 59%)
HSV	hsv(199, 63%, 86%)
CMYK	cmyk(63.2%, 20%, 0%, 13.7%)
CIE-LAB	lab(67.99, -14.82, -30.50)
CIE-LCH	lch(67.99, 33.91, 244.09°)
OKLab	oklab(71.78% -0.0688 -0.0853)
OKLCH	oklch(71.78% 0.11 231.1)
XYZ	xyz(31.8319, 37.9640, 73.3465)
Luminance	0.3797 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B0DC #DC7D51

analogous

#51DCC3 #51B0DC #516BDC

triadic

#51B0DC #DC51B0 #B0DC51

tetradic

#51B0DC #C351DC #DC7D51 #6BDC51

square

#51B0DC #C351DC #DC7D51 #6BDC51

split-complementary

#51B0DC #DC516B #DCC351

monochromatic

#1E6F95 #2895C8 #51B0DC #84C7E6 #B7DEF0

Accessibility & contrast

On white

2.44

#51B0DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.59

#51B0DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B0DC

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B0DC	#FFFFFF	#000000	##000000
##51B0DC	1.00	2.44	8.59	8.59
#FFFFFF	2.44	1.00	21.00	21.00
#000000	8.59	21.00	1.00	1.00
##000000	8.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9AAEDE

Deuteranopia (green-blind)

#879FDB

Tritanopia (blue-blind)

#00BCBF

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #51b0dc;
/* rgb */ color: rgb(81, 176, 220);
/* oklch */ color: oklch(71.8% 0.110 231.1);

Tailwind

colors: {
  custom: {
    50: '#8fc7e7',
    500: '#51b0dc',
    950: '#000000',
  },
}

SCSS

$custom: #51b0dc;
$custom-light: #8fc7e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51b0dc",
  "rgb": {
    "r": 81,
    "g": 176,
    "b": 220
  },
  "hsl": {
    "h": 198.993,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.71779,
    "c": 0.10964,
    "h": 231.1
  },
  "luminance": 0.37967
}

Semantic roles & 50–950 ramp

primary

#51B0DC

secondary

#E0BAA9

accent

#753EE9

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B0DC

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

Preview Lab → · Contrast checker → · Palette generator →