#51B1DC#51B1DC

#51B1DC is a light, moderate cyan. Relative luminance 0.384; OKLCH L 72.0% C 0.109 H 230.3°. Best body text is #000000 at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#51B1DC
RGB	rgb(81, 177, 220)
HSL	hsl(199, 67%, 59%)
HSV	hsv(199, 63%, 86%)
CMYK	cmyk(63.2%, 19.5%, 0%, 13.7%)
CIE-LAB	lab(68.28, -15.35, -30.06)
CIE-LCH	lch(68.28, 33.75, 242.95°)
OKLab	oklab(72.01% -0.0699 -0.0841)
OKLCH	oklch(72.01% 0.109 230.3)
XYZ	xyz(32.0287, 38.3576, 73.4121)
Luminance	0.3836 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B1DC #DC7C51

analogous

#51DCC2 #51B1DC #516CDC

triadic

#51B1DC #DC51B1 #B1DC51

tetradic

#51B1DC #C251DC #DC7C51 #6CDC51

square

#51B1DC #C251DC #DC7C51 #6CDC51

split-complementary

#51B1DC #DC516C #DCC251

monochromatic

#1E7095 #2896C8 #51B1DC #84C8E6 #B7DFF0

Accessibility & contrast

On white

2.42

#51B1DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.67

#51B1DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B1DC

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B1DC	#FFFFFF	#000000	##000000
##51B1DC	1.00	2.42	8.67	8.67
#FFFFFF	2.42	1.00	21.00	21.00
#000000	8.67	21.00	1.00	1.00
##000000	8.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BAFDE

Deuteranopia (green-blind)

#88A0DB

Tritanopia (blue-blind)

#00BDBF

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #51b1dc;
/* rgb */ color: rgb(81, 177, 220);
/* oklch */ color: oklch(72.0% 0.109 230.3);

Tailwind

colors: {
  custom: {
    50: '#8fc8e7',
    500: '#51b1dc',
    950: '#000000',
  },
}

SCSS

$custom: #51b1dc;
$custom-light: #8fc8e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51b1dc",
  "rgb": {
    "r": 81,
    "g": 177,
    "b": 220
  },
  "hsl": {
    "h": 198.561,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.7201,
    "c": 0.10931,
    "h": 230.3
  },
  "luminance": 0.38361
}

Semantic roles & 50–950 ramp

primary

#51B1DC

secondary

#E0BAA9

accent

#733EE9

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B1DC

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

Preview Lab → · Contrast checker → · Palette generator →