#51C5DE#51C5DE

#51C5DE is a light, moderate cyan. Relative luminance 0.470; OKLCH L 76.7% C 0.109 H 214.4°. Best body text is #000000 at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#51C5DE
RGB	rgb(81, 197, 222)
HSL	hsl(191, 68%, 59%)
HSV	hsv(191, 64%, 87%)
CMYK	cmyk(63.5%, 11.3%, 0%, 12.9%)
CIE-LAB	lab(74.16, -25.06, -22.14)
CIE-LCH	lch(74.16, 33.44, 221.47°)
OKLab	oklab(76.74% -0.0897 -0.0615)
OKLCH	oklch(76.74% 0.109 214.4)
XYZ	xyz(36.5390, 46.9519, 76.2300)
Luminance	0.4696 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C5DE #DE6A51

analogous

#51DEB0 #51C5DE #517FDE

triadic

#51C5DE #DE51C5 #C5DE51

tetradic

#51C5DE #B051DE #DE6A51 #7FDE51

square

#51C5DE #B051DE #DE6A51 #7FDE51

split-complementary

#51C5DE #DE517F #DEB051

monochromatic

#1D8298 #27AECB #51C5DE #84D6E8 #B8E7F2

Accessibility & contrast

On white

2.02

#51C5DE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.39

#51C5DE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C5DE

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C5DE	#FFFFFF	#000000	##000000
##51C5DE	1.00	2.02	10.39	10.39
#FFFFFF	2.02	1.00	21.00	21.00
#000000	10.39	21.00	1.00	1.00
##000000	10.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B3BFDF

Deuteranopia (green-blind)

#9EB0DE

Tritanopia (blue-blind)

#00CFCD

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #51c5de;
/* rgb */ color: rgb(81, 197, 222);
/* oklch */ color: oklch(76.7% 0.109 214.4);

Tailwind

colors: {
  custom: {
    50: '#91d6e8',
    500: '#51c5de',
    950: '#000000',
  },
}

SCSS

$custom: #51c5de;
$custom-light: #91d6e8;
$custom-dark: #000000;

JSON

{
  "hex": "#51c5de",
  "rgb": {
    "r": 81,
    "g": 197,
    "b": 222
  },
  "hsl": {
    "h": 190.638,
    "s": 68.116,
    "l": 59.412
  },
  "oklch": {
    "l": 0.76736,
    "c": 0.1088,
    "h": 214.4
  },
  "luminance": 0.46956
}

Semantic roles & 50–950 ramp

primary

#51C5DE

secondary

#E1B4AA

accent

#5C3DEB

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C5DE

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

Preview Lab → · Contrast checker → · Palette generator →