#51A8DC#51A8DC

#51A8DC is a light, moderate cyan. Relative luminance 0.349; OKLCH L 69.9% C 0.113 H 237.7°. Best body text is #000000 at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#51A8DC
RGB	rgb(81, 168, 220)
HSL	hsl(202, 67%, 59%)
HSV	hsv(202, 63%, 86%)
CMYK	cmyk(63.2%, 23.6%, 0%, 13.7%)
CIE-LAB	lab(65.69, -10.49, -34.08)
CIE-LCH	lch(65.69, 35.66, 252.89°)
OKLab	oklab(69.94% -0.0605 -0.0956)
OKLCH	oklch(69.94% 0.113 237.7)
XYZ	xyz(30.3093, 34.9188, 72.8390)
Luminance	0.3492 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A8DC #DC8551

analogous

#51DCCB #51A8DC #5163DC

triadic

#51A8DC #DC51A8 #A8DC51

tetradic

#51A8DC #CB51DC #DC8551 #63DC51

square

#51A8DC #CB51DC #DC8551 #63DC51

split-complementary

#51A8DC #DC5163 #DCCB51

monochromatic

#1E6895 #288CC8 #51A8DC #84C1E6 #B7DBF0

Accessibility & contrast

On white

2.63

#51A8DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.98

#51A8DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A8DC

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A8DC	#FFFFFF	#000000	##000000
##51A8DC	1.00	2.63	7.98	7.98
#FFFFFF	2.63	1.00	21.00	21.00
#000000	7.98	21.00	1.00	1.00
##000000	7.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#90A7DE

Deuteranopia (green-blind)

#7D99DB

Tritanopia (blue-blind)

#00B5BA

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #51a8dc;
/* rgb */ color: rgb(81, 168, 220);
/* oklch */ color: oklch(69.9% 0.113 237.7);

Tailwind

colors: {
  custom: {
    50: '#8fc1e7',
    500: '#51a8dc',
    950: '#000000',
  },
}

SCSS

$custom: #51a8dc;
$custom-light: #8fc1e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51a8dc",
  "rgb": {
    "r": 81,
    "g": 168,
    "b": 220
  },
  "hsl": {
    "h": 202.446,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.69943,
    "c": 0.1132,
    "h": 237.7
  },
  "luminance": 0.34922
}

Semantic roles & 50–950 ramp

primary

#51A8DC

secondary

#E0BEA9

accent

#7E3EE9

background

#F9FBFE

surface

#F2F7FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A8DC

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

Preview Lab → · Contrast checker → · Palette generator →