#51B2DC#51B2DC

#51B2DC is a light, moderate cyan. Relative luminance 0.388; OKLCH L 72.2% C 0.109 H 229.4°. Best body text is #000000 at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#51B2DC
RGB	rgb(81, 178, 220)
HSL	hsl(198, 67%, 59%)
HSV	hsv(198, 63%, 86%)
CMYK	cmyk(63.2%, 19.1%, 0%, 13.7%)
CIE-LAB	lab(68.57, -15.88, -29.61)
CIE-LCH	lch(68.57, 33.60, 241.79°)
OKLab	oklab(72.24% -0.0709 -0.0828)
OKLCH	oklch(72.24% 0.109 229.4)
XYZ	xyz(32.2269, 38.7541, 73.4782)
Luminance	0.3876 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B2DC #DC7B51

analogous

#51DCC0 #51B2DC #516DDC

triadic

#51B2DC #DC51B2 #B2DC51

tetradic

#51B2DC #C051DC #DC7B51 #6DDC51

square

#51B2DC #C051DC #DC7B51 #6DDC51

split-complementary

#51B2DC #DC516D #DCC051

monochromatic

#1E7195 #2897C8 #51B2DC #84C9E6 #B7DFF0

Accessibility & contrast

On white

2.40

#51B2DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.75

#51B2DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2DC

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B2DC	#FFFFFF	#000000	##000000
##51B2DC	1.00	2.40	8.75	8.75
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.75	21.00	1.00	1.00
##000000	8.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CAFDE

Deuteranopia (green-blind)

#89A1DB

Tritanopia (blue-blind)

#00BEC0

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #51b2dc;
/* rgb */ color: rgb(81, 178, 220);
/* oklch */ color: oklch(72.2% 0.109 229.4);

Tailwind

colors: {
  custom: {
    50: '#8fc9e7',
    500: '#51b2dc',
    950: '#000000',
  },
}

SCSS

$custom: #51b2dc;
$custom-light: #8fc9e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51b2dc",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 220
  },
  "hsl": {
    "h": 198.129,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.7224,
    "c": 0.109,
    "h": 229.4
  },
  "luminance": 0.38757
}

Semantic roles & 50–950 ramp

primary

#51B2DC

secondary

#E0BAA9

accent

#723EE9

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B2DC

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

Preview Lab → · Contrast checker → · Palette generator →