#51B7DC#51B7DC

#51B7DC is a light, moderate cyan. Relative luminance 0.408; OKLCH L 73.4% C 0.108 H 225.1°. Best body text is #000000 at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#51B7DC
RGB	rgb(81, 183, 220)
HSL	hsl(196, 67%, 59%)
HSV	hsv(196, 63%, 86%)
CMYK	cmyk(63.2%, 16.8%, 0%, 13.7%)
CIE-LAB	lab(70.02, -18.51, -27.38)
CIE-LCH	lch(70.02, 33.05, 235.94°)
OKLab	oklab(73.4% -0.0761 -0.0764)
OKLCH	oklch(73.4% 0.108 225.1)
XYZ	xyz(33.2400, 40.7802, 73.8158)
Luminance	0.4078 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B7DC #DC7651

analogous

#51DCBC #51B7DC #5172DC

triadic

#51B7DC #DC51B7 #B7DC51

tetradic

#51B7DC #BC51DC #DC7651 #72DC51

square

#51B7DC #BC51DC #DC7651 #72DC51

split-complementary

#51B7DC #DC5172 #DCBC51

monochromatic

#1E7595 #289DC8 #51B7DC #84CCE6 #B7E1F0

Accessibility & contrast

On white

2.29

#51B7DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.16

#51B7DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B7DC

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B7DC	#FFFFFF	#000000	##000000
##51B7DC	1.00	2.29	9.16	9.16
#FFFFFF	2.29	1.00	21.00	21.00
#000000	9.16	21.00	1.00	1.00
##000000	9.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3B3DE

Deuteranopia (green-blind)

#8FA5DC

Tritanopia (blue-blind)

#00C2C3

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #51b7dc;
/* rgb */ color: rgb(81, 183, 220);
/* oklch */ color: oklch(73.4% 0.108 225.1);

Tailwind

colors: {
  custom: {
    50: '#8fcce7',
    500: '#51b7dc',
    950: '#000000',
  },
}

SCSS

$custom: #51b7dc;
$custom-light: #8fcce7;
$custom-dark: #000000;

JSON

{
  "hex": "#51b7dc",
  "rgb": {
    "r": 81,
    "g": 183,
    "b": 220
  },
  "hsl": {
    "h": 195.971,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.73397,
    "c": 0.10782,
    "h": 225.1
  },
  "luminance": 0.40784
}

Semantic roles & 50–950 ramp

primary

#51B7DC

secondary

#E0B8A9

accent

#6C3EE9

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B7DC

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

Preview Lab → · Contrast checker → · Palette generator →