#51A7DD#51A7DD

#51A7DD is a light, moderate cyan. Relative luminance 0.346; OKLCH L 69.8% C 0.115 H 239.0°. Best body text is #000000 at 7.92:1 contrast (WCAG AA passes).

Color values

HEX	#51A7DD
RGB	rgb(81, 167, 221)
HSL	hsl(203, 67%, 59%)
HSV	hsv(203, 63%, 87%)
CMYK	cmyk(63.3%, 24.4%, 0%, 13.3%)
CIE-LAB	lab(65.44, -9.63, -35.01)
CIE-LCH	lch(65.44, 36.31, 254.63°)
OKLab	oklab(69.76% -0.0592 -0.0984)
OKLCH	oklch(69.76% 0.115 239)
XYZ	xyz(30.2582, 34.6042, 73.4772)
Luminance	0.3461 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A7DD #DD8751

analogous

#51DDCD #51A7DD #5161DD

triadic

#51A7DD #DD51A7 #A7DD51

tetradic

#51A7DD #CD51DD #DD8751 #61DD51

square

#51A7DD #CD51DD #DD8751 #61DD51

split-complementary

#51A7DD #DD5161 #DDCD51

monochromatic

#1D6896 #278BC9 #51A7DD #84C1E7 #B7DBF1

Accessibility & contrast

On white

2.65

#51A7DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.92

#51A7DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A7DD

7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A7DD	#FFFFFF	#000000	##000000
##51A7DD	1.00	2.65	7.92	7.92
#FFFFFF	2.65	1.00	21.00	21.00
#000000	7.92	21.00	1.00	1.00
##000000	7.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8EA7E0

Deuteranopia (green-blind)

#7B99DC

Tritanopia (blue-blind)

#00B5B9

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #51a7dd;
/* rgb */ color: rgb(81, 167, 221);
/* oklch */ color: oklch(69.8% 0.115 239.0);

Tailwind

colors: {
  custom: {
    50: '#8fc1e7',
    500: '#51a7dd',
    950: '#000000',
  },
}

SCSS

$custom: #51a7dd;
$custom-light: #8fc1e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51a7dd",
  "rgb": {
    "r": 81,
    "g": 167,
    "b": 221
  },
  "hsl": {
    "h": 203.143,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.69762,
    "c": 0.11478,
    "h": 239
  },
  "luminance": 0.34607
}

Semantic roles & 50–950 ramp

primary

#51A7DD

secondary

#E0BFAA

accent

#803EEA

background

#F9FBFE

surface

#F2F7FC

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A7DD

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

Preview Lab → · Contrast checker → · Palette generator →