#51BBD8#51BBD8

#51BBD8 is a light, moderate cyan. Relative luminance 0.422; OKLCH L 74.2% C 0.105 H 218.8°. Best body text is #000000 at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#51BBD8
RGB	rgb(81, 187, 216)
HSL	hsl(193, 63%, 58%)
HSV	hsv(193, 63%, 85%)
CMYK	cmyk(62.5%, 13.4%, 0%, 15.3%)
CIE-LAB	lab(71.04, -21.79, -23.64)
CIE-LCH	lch(71.04, 32.15, 227.33°)
OKLab	oklab(74.16% -0.0817 -0.0658)
OKLCH	oklch(74.16% 0.105 218.8)
XYZ	xyz(33.5533, 42.2444, 71.3381)
Luminance	0.4225 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBD8 #D86E51

analogous

#51D8B1 #51BBD8 #5177D8

triadic

#51BBD8 #D851BB #BBD851

tetradic

#51BBD8 #B151D8 #D86E51 #77D851

square

#51BBD8 #B151D8 #D86E51 #77D851

split-complementary

#51BBD8 #D85177 #D8B151

monochromatic

#20778F #2BA1C1 #51BBD8 #83CFE3 #B5E2EE

Accessibility & contrast

On white

2.22

#51BBD8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.45

#51BBD8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBD8

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBD8	#FFFFFF	#000000	##000000
##51BBD8	1.00	2.22	9.45	9.45
#FFFFFF	2.22	1.00	21.00	21.00
#000000	9.45	21.00	1.00	1.00
##000000	9.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9B6DA

Deuteranopia (green-blind)

#95A8D8

Tritanopia (blue-blind)

#00C5C4

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51bbd8;
/* rgb */ color: rgb(81, 187, 216);
/* oklch */ color: oklch(74.2% 0.105 218.8);

Tailwind

colors: {
  custom: {
    50: '#8fcfe4',
    500: '#51bbd8',
    950: '#000000',
  },
}

SCSS

$custom: #51bbd8;
$custom-light: #8fcfe4;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbd8",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 216
  },
  "hsl": {
    "h": 192.889,
    "s": 63.38,
    "l": 58.235
  },
  "oklch": {
    "l": 0.74163,
    "c": 0.10491,
    "h": 218.8
  },
  "luminance": 0.42248
}

Semantic roles & 50–950 ramp

primary

#51BBD8

secondary

#DDB3A8

accent

#6541E6

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51BBD8

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

Preview Lab → · Contrast checker → · Palette generator →