#51ADD5#51ADD5

#51ADD5 is a light, moderate cyan. Relative luminance 0.364; OKLCH L 70.8% C 0.105 H 229.3°. Best body text is #000000 at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#51ADD5
RGB	rgb(81, 173, 213)
HSL	hsl(198, 61%, 58%)
HSV	hsv(198, 62%, 84%)
CMYK	cmyk(62%, 18.8%, 0%, 16.5%)
CIE-LAB	lab(66.85, -15.40, -28.42)
CIE-LCH	lch(66.85, 32.32, 241.54°)
OKLab	oklab(70.78% -0.0682 -0.0794)
OKLCH	oklch(70.78% 0.105 229.3)
XYZ	xyz(30.3425, 36.4375, 68.3720)
Luminance	0.3644 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51ADD5 #D57951

analogous

#51D5BB #51ADD5 #516BD5

triadic

#51ADD5 #D551AD #ADD551

tetradic

#51ADD5 #BB51D5 #D57951 #6BD551

square

#51ADD5 #BB51D5 #D57951 #6BD551

split-complementary

#51ADD5 #D5516B #D5BB51

monochromatic

#216A8A #2D90BC #51ADD5 #82C4E1 #B4DBED

Accessibility & contrast

On white

2.53

#51ADD5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.29

#51ADD5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51ADD5

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51ADD5	#FFFFFF	#000000	##000000
##51ADD5	1.00	2.53	8.29	8.29
#FFFFFF	2.53	1.00	21.00	21.00
#000000	8.29	21.00	1.00	1.00
##000000	8.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#98AAD7

Deuteranopia (green-blind)

#869DD4

Tritanopia (blue-blind)

#00B8BA

Achromatopsia (no color)

#A3A3A3

Design tokens & code

CSS

--color: #51add5;
/* rgb */ color: rgb(81, 173, 213);
/* oklch */ color: oklch(70.8% 0.105 229.3);

Tailwind

colors: {
  custom: {
    50: '#8ec5e2',
    500: '#51add5',
    950: '#000000',
  },
}

SCSS

$custom: #51add5;
$custom-light: #8ec5e2;
$custom-dark: #000000;

JSON

{
  "hex": "#51add5",
  "rgb": {
    "r": 81,
    "g": 173,
    "b": 213
  },
  "hsl": {
    "h": 198.182,
    "s": 61.111,
    "l": 57.647
  },
  "oklch": {
    "l": 0.7078,
    "c": 0.10465,
    "h": 229.3
  },
  "luminance": 0.36441
}

Semantic roles & 50–950 ramp

primary

#51ADD5

secondary

#DBB6A6

accent

#7444E4

background

#F9FCFD

surface

#F2F8FB

border

#CCD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #51ADD5

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

Preview Lab → · Contrast checker → · Palette generator →