#51BCDA#51BCDA

#51BCDA is a light, moderate cyan. Relative luminance 0.428; OKLCH L 74.5% C 0.106 H 219.4°. Best body text is #000000 at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#51BCDA
RGB	rgb(81, 188, 218)
HSL	hsl(193, 65%, 59%)
HSV	hsv(193, 63%, 85%)
CMYK	cmyk(62.8%, 13.8%, 0%, 14.5%)
CIE-LAB	lab(71.40, -21.70, -24.18)
CIE-LCH	lch(71.40, 32.49, 228.09°)
OKLab	oklab(74.48% -0.082 -0.0673)
OKLCH	oklch(74.48% 0.106 219.4)
XYZ	xyz(34.0263, 42.7742, 72.7791)
Luminance	0.4278 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCDA #DA6F51

analogous

#51DAB3 #51BCDA #5177DA

triadic

#51BCDA #DA51BC #BCDA51

tetradic

#51BCDA #B351DA #DA6F51 #77DA51

square

#51BCDA #B351DA #DA6F51 #77DA51

split-complementary

#51BCDA #DA5177 #DAB351

monochromatic

#1F7992 #2AA2C4 #51BCDA #83CFE5 #B6E3EF

Accessibility & contrast

On white

2.20

#51BCDA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.56

#51BCDA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCDA

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCDA	#FFFFFF	#000000	##000000
##51BCDA	1.00	2.20	9.56	9.56
#FFFFFF	2.20	1.00	21.00	21.00
#000000	9.56	21.00	1.00	1.00
##000000	9.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9B7DC

Deuteranopia (green-blind)

#96A9DA

Tritanopia (blue-blind)

#00C6C5

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #51bcda;
/* rgb */ color: rgb(81, 188, 218);
/* oklch */ color: oklch(74.5% 0.106 219.4);

Tailwind

colors: {
  custom: {
    50: '#90d0e5',
    500: '#51bcda',
    950: '#000000',
  },
}

SCSS

$custom: #51bcda;
$custom-light: #90d0e5;
$custom-dark: #000000;

JSON

{
  "hex": "#51bcda",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 218
  },
  "hsl": {
    "h": 193.139,
    "s": 64.929,
    "l": 58.627
  },
  "oklch": {
    "l": 0.74477,
    "c": 0.10608,
    "h": 219.4
  },
  "luminance": 0.42778
}

Semantic roles & 50–950 ramp

primary

#51BCDA

secondary

#DEB4A8

accent

#6540E8

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1415

muted

#7E8284

Preview Lab

Preview with #51BCDA

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

Preview Lab → · Contrast checker → · Palette generator →