#51BCD3#51BCD3

#51BCD3 is a light, moderate cyan. Relative luminance 0.424; OKLCH L 74.2% C 0.102 H 214.2°. Best body text is #000000 at 9.48:1 contrast (WCAG AA passes).

Color values

HEX	#51BCD3
RGB	rgb(81, 188, 211)
HSL	hsl(191, 60%, 57%)
HSV	hsv(191, 62%, 83%)
CMYK	cmyk(61.6%, 10.9%, 0%, 17.3%)
CIE-LAB	lab(71.16, -23.79, -20.73)
CIE-LCH	lch(71.16, 31.56, 221.07°)
OKLab	oklab(74.2% -0.0847 -0.0576)
OKLCH	oklch(74.2% 0.102 214.2)
XYZ	xyz(33.1296, 42.4155, 68.0564)
Luminance	0.4242 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCD3 #D36851

analogous

#51D3A9 #51BCD3 #517BD3

triadic

#51BCD3 #D351BC #BCD351

tetradic

#51BCD3 #A951D3 #D36851 #7BD351

square

#51BCD3 #A951D3 #D36851 #7BD351

split-complementary

#51BCD3 #D3517B #D3A951

monochromatic

#227587 #2FA0B8 #51BCD3 #82CFDF #B3E2EC

Accessibility & contrast

On white

2.21

#51BCD3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.48

#51BCD3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCD3

9.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCD3	#FFFFFF	#000000	##000000
##51BCD3	1.00	2.21	9.48	9.48
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.48	21.00	1.00	1.00
##000000	9.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ABB6D4

Deuteranopia (green-blind)

#98A8D3

Tritanopia (blue-blind)

#00C5C3

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51bcd3;
/* rgb */ color: rgb(81, 188, 211);
/* oklch */ color: oklch(74.2% 0.102 214.2);

Tailwind

colors: {
  custom: {
    50: '#8fd0e0',
    500: '#51bcd3',
    950: '#000000',
  },
}

SCSS

$custom: #51bcd3;
$custom-light: #8fd0e0;
$custom-dark: #000000;

JSON

{
  "hex": "#51bcd3",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 211
  },
  "hsl": {
    "h": 190.615,
    "s": 59.633,
    "l": 57.255
  },
  "oklch": {
    "l": 0.742,
    "c": 0.10242,
    "h": 214.2
  },
  "luminance": 0.42419
}

Semantic roles & 50–950 ramp

primary

#51BCD3

secondary

#DAAFA6

accent

#6145E3

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51BCD3

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

Preview Lab → · Contrast checker → · Palette generator →