#51ADD8#51ADD8

#51ADD8 is a light, moderate cyan. Relative luminance 0.366; OKLCH L 70.9% C 0.107 H 231.2°. Best body text is #000000 at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#51ADD8
RGB	rgb(81, 173, 216)
HSL	hsl(199, 63%, 58%)
HSV	hsv(199, 63%, 85%)
CMYK	cmyk(62.5%, 19.9%, 0%, 15.3%)
CIE-LAB	lab(66.97, -14.47, -29.89)
CIE-LCH	lch(66.97, 33.21, 244.17°)
OKLab	oklab(70.91% -0.0671 -0.0836)
OKLCH	oklch(70.91% 0.107 231.2)
XYZ	xyz(30.7268, 36.5912, 70.3959)
Luminance	0.3659 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51ADD8 #D87C51

analogous

#51D8BF #51ADD8 #5169D8

triadic

#51ADD8 #D851AD #ADD851

tetradic

#51ADD8 #BF51D8 #D87C51 #69D851

square

#51ADD8 #BF51D8 #D87C51 #69D851

split-complementary

#51ADD8 #D85169 #D8BF51

monochromatic

#206B8F #2B91C1 #51ADD8 #83C5E3 #B5DCEE

Accessibility & contrast

On white

2.52

#51ADD8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.32

#51ADD8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51ADD8

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51ADD8	#FFFFFF	#000000	##000000
##51ADD8	1.00	2.52	8.32	8.32
#FFFFFF	2.52	1.00	21.00	21.00
#000000	8.32	21.00	1.00	1.00
##000000	8.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#97ABDA

Deuteranopia (green-blind)

#859DD7

Tritanopia (blue-blind)

#00B9BB

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #51add8;
/* rgb */ color: rgb(81, 173, 216);
/* oklch */ color: oklch(70.9% 0.107 231.2);

Tailwind

colors: {
  custom: {
    50: '#8ec5e4',
    500: '#51add8',
    950: '#000000',
  },
}

SCSS

$custom: #51add8;
$custom-light: #8ec5e4;
$custom-dark: #000000;

JSON

{
  "hex": "#51add8",
  "rgb": {
    "r": 81,
    "g": 173,
    "b": 216
  },
  "hsl": {
    "h": 199.111,
    "s": 63.38,
    "l": 58.235
  },
  "oklch": {
    "l": 0.70911,
    "c": 0.10721,
    "h": 231.2
  },
  "luminance": 0.36594
}

Semantic roles & 50–950 ramp

primary

#51ADD8

secondary

#DDB9A8

accent

#7641E6

background

#F9FCFD

surface

#F2F8FB

border

#CCD1D4

text

#0D1215

muted

#7E8183

Preview Lab

Preview with #51ADD8

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

Preview Lab → · Contrast checker → · Palette generator →