#51B0DA#51B0DA

#51B0DA is a light, moderate cyan. Relative luminance 0.379; OKLCH L 71.7% C 0.108 H 229.9°. Best body text is #000000 at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#51B0DA
RGB	rgb(81, 176, 218)
HSL	hsl(198, 65%, 59%)
HSV	hsv(198, 63%, 85%)
CMYK	cmyk(62.8%, 19.3%, 0%, 14.5%)
CIE-LAB	lab(67.92, -15.44, -29.53)
CIE-LCH	lch(67.92, 33.32, 242.39°)
OKLab	oklab(71.69% -0.0695 -0.0825)
OKLCH	oklch(71.69% 0.108 229.9)
XYZ	xyz(31.5686, 37.8587, 71.9598)
Luminance	0.3786 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B0DA #DA7B51

analogous

#51DABF #51B0DA #516BDA

triadic

#51B0DA #DA51B0 #B0DA51

tetradic

#51B0DA #BF51DA #DA7B51 #6BDA51

square

#51B0DA #BF51DA #DA7B51 #6BDA51

split-complementary

#51B0DA #DA516B #DABF51

monochromatic

#1F6E92 #2A95C4 #51B0DA #83C7E5 #B6DEEF

Accessibility & contrast

On white

2.45

#51B0DA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.57

#51B0DA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B0DA

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B0DA	#FFFFFF	#000000	##000000
##51B0DA	1.00	2.45	8.57	8.57
#FFFFFF	2.45	1.00	21.00	21.00
#000000	8.57	21.00	1.00	1.00
##000000	8.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BADDC

Deuteranopia (green-blind)

#879FD9

Tritanopia (blue-blind)

#00BCBE

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #51b0da;
/* rgb */ color: rgb(81, 176, 218);
/* oklch */ color: oklch(71.7% 0.108 229.9);

Tailwind

colors: {
  custom: {
    50: '#8fc7e5',
    500: '#51b0da',
    950: '#000000',
  },
}

SCSS

$custom: #51b0da;
$custom-light: #8fc7e5;
$custom-dark: #000000;

JSON

{
  "hex": "#51b0da",
  "rgb": {
    "r": 81,
    "g": 176,
    "b": 218
  },
  "hsl": {
    "h": 198.394,
    "s": 64.929,
    "l": 58.627
  },
  "oklch": {
    "l": 0.71691,
    "c": 0.10794,
    "h": 229.9
  },
  "luminance": 0.37862
}

Semantic roles & 50–950 ramp

primary

#51B0DA

secondary

#DEB9A8

accent

#7340E8

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1315

muted

#7E8284

Preview Lab

Preview with #51B0DA

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

Preview Lab → · Contrast checker → · Palette generator →