#51B3DE#51B3DE

#51B3DE is a light, moderate cyan. Relative luminance 0.393; OKLCH L 72.6% C 0.110 H 229.8°. Best body text is #000000 at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#51B3DE
RGB	rgb(81, 179, 222)
HSL	hsl(198, 68%, 59%)
HSV	hsv(198, 64%, 87%)
CMYK	cmyk(63.5%, 19.4%, 0%, 12.9%)
CIE-LAB	lab(68.94, -15.79, -30.14)
CIE-LCH	lch(68.94, 34.03, 242.35°)
OKLab	oklab(72.56% -0.0712 -0.0843)
OKLCH	oklch(72.56% 0.11 229.8)
XYZ	xyz(32.6931, 39.2601, 74.9481)
Luminance	0.3926 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B3DE #DE7C51

analogous

#51DEC3 #51B3DE #516DDE

triadic

#51B3DE #DE51B3 #B3DE51

tetradic

#51B3DE #C351DE #DE7C51 #6DDE51

square

#51B3DE #C351DE #DE7C51 #6DDE51

split-complementary

#51B3DE #DE516D #DEC351

monochromatic

#1D7298 #2799CB #51B3DE #84C9E8 #B8E0F2

Accessibility & contrast

On white

2.37

#51B3DE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.85

#51B3DE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B3DE

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B3DE	#FFFFFF	#000000	##000000
##51B3DE	1.00	2.37	8.85	8.85
#FFFFFF	2.37	1.00	21.00	21.00
#000000	8.85	21.00	1.00	1.00
##000000	8.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB0E0

Deuteranopia (green-blind)

#89A2DD

Tritanopia (blue-blind)

#00BFC1

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #51b3de;
/* rgb */ color: rgb(81, 179, 222);
/* oklch */ color: oklch(72.6% 0.110 229.8);

Tailwind

colors: {
  custom: {
    50: '#8fc9e8',
    500: '#51b3de',
    950: '#000000',
  },
}

SCSS

$custom: #51b3de;
$custom-light: #8fc9e8;
$custom-dark: #000000;

JSON

{
  "hex": "#51b3de",
  "rgb": {
    "r": 81,
    "g": 179,
    "b": 222
  },
  "hsl": {
    "h": 198.298,
    "s": 68.116,
    "l": 59.412
  },
  "oklch": {
    "l": 0.72558,
    "c": 0.11036,
    "h": 229.8
  },
  "luminance": 0.39263
}

Semantic roles & 50–950 ramp

primary

#51B3DE

secondary

#E1BBAA

accent

#723DEB

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B3DE

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

Preview Lab → · Contrast checker → · Palette generator →