#51ACD8#51ACD8

#51ACD8 is a light, moderate cyan. Relative luminance 0.362; OKLCH L 70.7% C 0.108 H 232.1°. Best body text is #000000 at 8.24:1 contrast (WCAG AA passes).

Color values

HEX	#51ACD8
RGB	rgb(81, 172, 216)
HSL	hsl(200, 63%, 58%)
HSV	hsv(200, 63%, 85%)
CMYK	cmyk(62.5%, 20.4%, 0%, 15.3%)
CIE-LAB	lab(66.68, -13.93, -30.34)
CIE-LCH	lch(66.68, 33.38, 245.34°)
OKLab	oklab(70.68% -0.0661 -0.0849)
OKLCH	oklch(70.68% 0.108 232.1)
XYZ	xyz(30.5357, 36.2092, 70.3322)
Luminance	0.3621 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51ACD8 #D87D51

analogous

#51D8C1 #51ACD8 #5168D8

triadic

#51ACD8 #D851AC #ACD851

tetradic

#51ACD8 #C151D8 #D87D51 #68D851

square

#51ACD8 #C151D8 #D87D51 #68D851

split-complementary

#51ACD8 #D85168 #D8C151

monochromatic

#206B8F #2B90C1 #51ACD8 #83C4E3 #B5DCEE

Accessibility & contrast

On white

2.55

#51ACD8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.24

#51ACD8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51ACD8

8.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51ACD8	#FFFFFF	#000000	##000000
##51ACD8	1.00	2.55	8.24	8.24
#FFFFFF	2.55	1.00	21.00	21.00
#000000	8.24	21.00	1.00	1.00
##000000	8.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#96AADA

Deuteranopia (green-blind)

#839CD7

Tritanopia (blue-blind)

#00B8BB

Achromatopsia (no color)

#A2A2A2

Design tokens & code

CSS

--color: #51acd8;
/* rgb */ color: rgb(81, 172, 216);
/* oklch */ color: oklch(70.7% 0.108 232.1);

Tailwind

colors: {
  custom: {
    50: '#8ec4e4',
    500: '#51acd8',
    950: '#000000',
  },
}

SCSS

$custom: #51acd8;
$custom-light: #8ec4e4;
$custom-dark: #000000;

JSON

{
  "hex": "#51acd8",
  "rgb": {
    "r": 81,
    "g": 172,
    "b": 216
  },
  "hsl": {
    "h": 199.556,
    "s": 63.38,
    "l": 58.235
  },
  "oklch": {
    "l": 0.7068,
    "c": 0.10757,
    "h": 232.1
  },
  "luminance": 0.36212
}

Semantic roles & 50–950 ramp

primary

#51ACD8

secondary

#DDB9A8

accent

#7741E6

background

#F9FCFD

surface

#F2F8FB

border

#CCD1D4

text

#0D1215

muted

#7E8183

Preview Lab

Preview with #51ACD8

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

Preview Lab → · Contrast checker → · Palette generator →