#51ADD9#51ADD9

#51ADD9 is a light, moderate cyan. Relative luminance 0.366; OKLCH L 71.0% C 0.108 H 231.8°. Best body text is #000000 at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#51ADD9
RGB	rgb(81, 173, 217)
HSL	hsl(199, 64%, 58%)
HSV	hsv(199, 63%, 85%)
CMYK	cmyk(62.7%, 20.3%, 0%, 14.9%)
CIE-LAB	lab(67.01, -14.15, -30.38)
CIE-LCH	lch(67.01, 33.51, 245.02°)
OKLab	oklab(70.96% -0.0668 -0.085)
OKLCH	oklch(70.96% 0.108 231.8)
XYZ	xyz(30.8564, 36.6431, 71.0789)
Luminance	0.3665 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51ADD9 #D97D51

analogous

#51D9C1 #51ADD9 #5169D9

triadic

#51ADD9 #D951AD #ADD951

tetradic

#51ADD9 #C151D9 #D97D51 #69D951

square

#51ADD9 #C151D9 #D97D51 #69D951

split-complementary

#51ADD9 #D95169 #D9C151

monochromatic

#1F6C90 #2A91C2 #51ADD9 #83C5E4 #B5DCEF

Accessibility & contrast

On white

2.52

#51ADD9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.33

#51ADD9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51ADD9

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51ADD9	#FFFFFF	#000000	##000000
##51ADD9	1.00	2.52	8.33	8.33
#FFFFFF	2.52	1.00	21.00	21.00
#000000	8.33	21.00	1.00	1.00
##000000	8.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#97ABDB

Deuteranopia (green-blind)

#849DD8

Tritanopia (blue-blind)

#00B9BC

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #51add9;
/* rgb */ color: rgb(81, 173, 217);
/* oklch */ color: oklch(71.0% 0.108 231.8);

Tailwind

colors: {
  custom: {
    50: '#8fc5e5',
    500: '#51add9',
    950: '#000000',
  },
}

SCSS

$custom: #51add9;
$custom-light: #8fc5e5;
$custom-dark: #000000;

JSON

{
  "hex": "#51add9",
  "rgb": {
    "r": 81,
    "g": 173,
    "b": 217
  },
  "hsl": {
    "h": 199.412,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.70955,
    "c": 0.10808,
    "h": 231.8
  },
  "luminance": 0.36646
}

Semantic roles & 50–950 ramp

primary

#51ADD9

secondary

#DEB9A8

accent

#7741E7

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0D1215

muted

#7E8184

Preview Lab

Preview with #51ADD9

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

Preview Lab → · Contrast checker → · Palette generator →