#51B2DA#51B2DA

#51B2DA is a light, moderate cyan. Relative luminance 0.387; OKLCH L 72.2% C 0.107 H 228.2°. Best body text is #000000 at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#51B2DA
RGB	rgb(81, 178, 218)
HSL	hsl(198, 65%, 59%)
HSV	hsv(198, 63%, 85%)
CMYK	cmyk(62.8%, 18.3%, 0%, 14.5%)
CIE-LAB	lab(68.50, -16.50, -28.63)
CIE-LCH	lch(68.50, 33.05, 240.04°)
OKLab	oklab(72.15% -0.0716 -0.08)
OKLCH	oklch(72.15% 0.107 228.2)
XYZ	xyz(31.9636, 38.6488, 72.0915)
Luminance	0.3865 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B2DA #DA7951

analogous

#51DABD #51B2DA #516DDA

triadic

#51B2DA #DA51B2 #B2DA51

tetradic

#51B2DA #BD51DA #DA7951 #6DDA51

square

#51B2DA #BD51DA #DA7951 #6DDA51

split-complementary

#51B2DA #DA516D #DABD51

monochromatic

#1F7092 #2A97C4 #51B2DA #83C8E5 #B6DFEF

Accessibility & contrast

On white

2.41

#51B2DA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.73

#51B2DA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2DA

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B2DA	#FFFFFF	#000000	##000000
##51B2DA	1.00	2.41	8.73	8.73
#FFFFFF	2.41	1.00	21.00	21.00
#000000	8.73	21.00	1.00	1.00
##000000	8.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DAFDC

Deuteranopia (green-blind)

#8AA1D9

Tritanopia (blue-blind)

#00BDBF

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #51b2da;
/* rgb */ color: rgb(81, 178, 218);
/* oklch */ color: oklch(72.2% 0.107 228.2);

Tailwind

colors: {
  custom: {
    50: '#8fc9e5',
    500: '#51b2da',
    950: '#000000',
  },
}

SCSS

$custom: #51b2da;
$custom-light: #8fc9e5;
$custom-dark: #000000;

JSON

{
  "hex": "#51b2da",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 218
  },
  "hsl": {
    "h": 197.518,
    "s": 64.929,
    "l": 58.627
  },
  "oklch": {
    "l": 0.72154,
    "c": 0.10737,
    "h": 228.2
  },
  "luminance": 0.38652
}

Semantic roles & 50–950 ramp

primary

#51B2DA

secondary

#DEB8A8

accent

#7140E8

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1315

muted

#7E8284

Preview Lab

Preview with #51B2DA

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

Preview Lab → · Contrast checker → · Palette generator →