#51BCEA#51BCEA

#51BCEA is a light, moderate cyan. Relative luminance 0.437; OKLCH L 75.1% C 0.117 H 229.6°. Best body text is #000000 at 9.73:1 contrast (WCAG AA passes).

Color values

HEX	#51BCEA
RGB	rgb(81, 188, 234)
HSL	hsl(198, 78%, 62%)
HSV	hsv(198, 65%, 92%)
CMYK	cmyk(65.4%, 19.7%, 0%, 8.2%)
CIE-LAB	lab(72.00, -16.79, -31.96)
CIE-LCH	lch(72.00, 36.10, 242.29°)
OKLab	oklab(75.15% -0.0761 -0.0895)
OKLCH	oklch(75.15% 0.117 229.6)
XYZ	xyz(36.2220, 43.6524, 84.3428)
Luminance	0.4366 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCEA #EA7F51

analogous

#51EACC #51BCEA #5170EA

triadic

#51BCEA #EA51BC #BCEA51

tetradic

#51BCEA #CC51EA #EA7F51 #70EA51

square

#51BCEA #CC51EA #EA7F51 #70EA51

split-complementary

#51BCEA #EA5170 #EACC51

monochromatic

#157EAC #1BA7E2 #51BCEA #88D1F1 #BEE6F7

Accessibility & contrast

On white

2.16

#51BCEA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.73

#51BCEA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCEA

9.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCEA	#FFFFFF	#000000	##000000
##51BCEA	1.00	2.16	9.73	9.73
#FFFFFF	2.16	1.00	21.00	21.00
#000000	9.73	21.00	1.00	1.00
##000000	9.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B9EC

Deuteranopia (green-blind)

#8FAAE9

Tritanopia (blue-blind)

#00C9CB

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #51bcea;
/* rgb */ color: rgb(81, 188, 234);
/* oklch */ color: oklch(75.1% 0.117 229.6);

Tailwind

colors: {
  custom: {
    50: '#91d0f1',
    500: '#51bcea',
    950: '#000000',
  },
}

SCSS

$custom: #51bcea;
$custom-light: #91d0f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51bcea",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 234
  },
  "hsl": {
    "h": 198.039,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.75149,
    "c": 0.11748,
    "h": 229.6
  },
  "luminance": 0.43656
}

Semantic roles & 50–950 ramp

primary

#51BCEA

secondary

#E8C0AF

accent

#490BDB

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BCEA

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

Preview Lab → · Contrast checker → · Palette generator →