#51C5F2#51C5F2

#51C5F2 is a light, vivid cyan. Relative luminance 0.481; OKLCH L 77.6% C 0.121 H 227.3°. Best body text is #000000 at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#51C5F2
RGB	rgb(81, 197, 242)
HSL	hsl(197, 86%, 63%)
HSV	hsv(197, 67%, 95%)
CMYK	cmyk(66.5%, 18.6%, 0%, 5.1%)
CIE-LAB	lab(74.88, -18.98, -31.83)
CIE-LCH	lch(74.88, 37.06, 239.20°)
OKLab	oklab(77.55% -0.0822 -0.0891)
OKLCH	oklch(77.55% 0.121 227.3)
XYZ	xyz(39.3802, 48.0884, 91.1938)
Luminance	0.4809 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C5F2 #F27E51

analogous

#51F2CE #51C5F2 #5174F2

triadic

#51C5F2 #F251C5 #C5F251

tetradic

#51C5F2 #CE51F2 #F27E51 #74F251

square

#51C5F2 #CE51F2 #F27E51 #74F251

split-complementary

#51C5F2 #F25174 #F2CE51

monochromatic

#0E8ABB #18B2EE #51C5F2 #8AD8F6 #C3EBFB

Accessibility & contrast

On white

1.98

#51C5F2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.62

#51C5F2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C5F2

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C5F2	#FFFFFF	#000000	##000000
##51C5F2	1.00	1.98	10.62	10.62
#FFFFFF	1.98	1.00	21.00	21.00
#000000	10.62	21.00	1.00	1.00
##000000	10.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADC2F4

Deuteranopia (green-blind)

#97B1F1

Tritanopia (blue-blind)

#00D2D4

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #51c5f2;
/* rgb */ color: rgb(81, 197, 242);
/* oklch */ color: oklch(77.6% 0.121 227.3);

Tailwind

colors: {
  custom: {
    50: '#93d6f6',
    500: '#51c5f2',
    950: '#000000',
  },
}

SCSS

$custom: #51c5f2;
$custom-light: #93d6f6;
$custom-dark: #000000;

JSON

{
  "hex": "#51c5f2",
  "rgb": {
    "r": 81,
    "g": 197,
    "b": 242
  },
  "hsl": {
    "h": 196.77,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.77553,
    "c": 0.12123,
    "h": 227.3
  },
  "luminance": 0.48093
}

Semantic roles & 50–950 ramp

primary

#51C5F2

secondary

#ECC3B3

accent

#4103E3

background

#F9FDFF

surface

#F2FAFE

border

#CCD3D6

text

#0E1417

muted

#7E8385

Preview Lab

Preview with #51C5F2

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

Preview Lab → · Contrast checker → · Palette generator →