#51C0EE#51C0EE

#51C0EE is a light, moderate cyan. Relative luminance 0.456; OKLCH L 76.2% C 0.119 H 228.8°. Best body text is #000000 at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#51C0EE
RGB	rgb(81, 192, 238)
HSL	hsl(198, 82%, 63%)
HSV	hsv(198, 66%, 93%)
CMYK	cmyk(66%, 19.3%, 0%, 6.7%)
CIE-LAB	lab(73.30, -17.63, -32.12)
CIE-LCH	lch(73.30, 36.64, 241.24°)
OKLab	oklab(76.24% -0.0787 -0.0899)
OKLCH	oklch(76.24% 0.119 228.8)
XYZ	xyz(37.6695, 45.6176, 87.6922)
Luminance	0.4562 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C0EE #EE7F51

analogous

#51EECE #51C0EE #5171EE

triadic

#51C0EE #EE51C0 #C0EE51

tetradic

#51C0EE #CE51EE #EE7F51 #71EE51

square

#51C0EE #CE51EE #EE7F51 #71EE51

split-complementary

#51C0EE #EE5171 #EECE51

monochromatic

#1184B3 #19ACE9 #51C0EE #89D4F3 #C1E8F9

Accessibility & contrast

On white

2.07

#51C0EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.12

#51C0EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C0EE

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C0EE	#FFFFFF	#000000	##000000
##51C0EE	1.00	2.07	10.12	10.12
#FFFFFF	2.07	1.00	21.00	21.00
#000000	10.12	21.00	1.00	1.00
##000000	10.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A8BDF0

Deuteranopia (green-blind)

#92ADED

Tritanopia (blue-blind)

#00CDCF

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #51c0ee;
/* rgb */ color: rgb(81, 192, 238);
/* oklch */ color: oklch(76.2% 0.119 228.8);

Tailwind

colors: {
  custom: {
    50: '#92d3f3',
    500: '#51c0ee',
    950: '#000000',
  },
}

SCSS

$custom: #51c0ee;
$custom-light: #92d3f3;
$custom-dark: #000000;

JSON

{
  "hex": "#51c0ee",
  "rgb": {
    "r": 81,
    "g": 192,
    "b": 238
  },
  "hsl": {
    "h": 197.58,
    "s": 82.199,
    "l": 62.549
  },
  "oklch": {
    "l": 0.76238,
    "c": 0.11949,
    "h": 228.8
  },
  "luminance": 0.45622
}

Semantic roles & 50–950 ramp

primary

#51C0EE

secondary

#EAC2B1

accent

#4607DF

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1417

muted

#7E8285

Preview Lab

Preview with #51C0EE

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

Preview Lab → · Contrast checker → · Palette generator →