#51BCD8#51BCD8

#51BCD8 is a light, moderate cyan. Relative luminance 0.427; OKLCH L 74.4% C 0.105 H 217.9°. Best body text is #000000 at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#51BCD8
RGB	rgb(81, 188, 216)
HSL	hsl(192, 63%, 58%)
HSV	hsv(192, 63%, 85%)
CMYK	cmyk(62.5%, 13%, 0%, 15.3%)
CIE-LAB	lab(71.33, -22.30, -23.19)
CIE-LCH	lch(71.33, 32.18, 226.12°)
OKLab	oklab(74.4% -0.0828 -0.0645)
OKLCH	oklch(74.4% 0.105 217.9)
XYZ	xyz(33.7662, 42.6701, 71.4091)
Luminance	0.4267 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCD8 #D86D51

analogous

#51D8B0 #51BCD8 #5179D8

triadic

#51BCD8 #D851BC #BCD851

tetradic

#51BCD8 #B051D8 #D86D51 #79D851

square

#51BCD8 #B051D8 #D86D51 #79D851

split-complementary

#51BCD8 #D85179 #D8B051

monochromatic

#20788F #2BA2C1 #51BCD8 #83CFE3 #B5E3EE

Accessibility & contrast

On white

2.20

#51BCD8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.53

#51BCD8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCD8

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCD8	#FFFFFF	#000000	##000000
##51BCD8	1.00	2.20	9.53	9.53
#FFFFFF	2.20	1.00	21.00	21.00
#000000	9.53	21.00	1.00	1.00
##000000	9.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AAB7DA

Deuteranopia (green-blind)

#96A8D8

Tritanopia (blue-blind)

#00C6C5

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #51bcd8;
/* rgb */ color: rgb(81, 188, 216);
/* oklch */ color: oklch(74.4% 0.105 217.9);

Tailwind

colors: {
  custom: {
    50: '#8fd0e4',
    500: '#51bcd8',
    950: '#000000',
  },
}

SCSS

$custom: #51bcd8;
$custom-light: #8fd0e4;
$custom-dark: #000000;

JSON

{
  "hex": "#51bcd8",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 216
  },
  "hsl": {
    "h": 192.444,
    "s": 63.38,
    "l": 58.235
  },
  "oklch": {
    "l": 0.74397,
    "c": 0.10494,
    "h": 217.9
  },
  "luminance": 0.42674
}

Semantic roles & 50–950 ramp

primary

#51BCD8

secondary

#DDB3A8

accent

#6441E6

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51BCD8

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

Preview Lab → · Contrast checker → · Palette generator →