#51C4DC#51C4DC

#51C4DC is a light, moderate cyan. Relative luminance 0.464; OKLCH L 76.4% C 0.108 H 213.9°. Best body text is #000000 at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#51C4DC
RGB	rgb(81, 196, 220)
HSL	hsl(190, 67%, 59%)
HSV	hsv(190, 63%, 86%)
CMYK	cmyk(63.2%, 10.9%, 0%, 13.7%)
CIE-LAB	lab(73.80, -25.15, -21.61)
CIE-LCH	lch(73.80, 33.16, 220.67°)
OKLab	oklab(76.43% -0.0895 -0.06)
OKLCH	oklch(76.43% 0.108 213.9)
XYZ	xyz(36.0462, 46.3927, 74.7513)
Luminance	0.4640 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C4DC #DC6951

analogous

#51DCAF #51C4DC #517FDC

triadic

#51C4DC #DC51C4 #C4DC51

tetradic

#51C4DC #AF51DC #DC6951 #7FDC51

square

#51C4DC #AF51DC #DC6951 #7FDC51

split-complementary

#51C4DC #DC517F #DCAF51

monochromatic

#1E8095 #28ACC8 #51C4DC #84D5E6 #B7E7F0

Accessibility & contrast

On white

2.04

#51C4DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.28

#51C4DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4DC

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C4DC	#FFFFFF	#000000	##000000
##51C4DC	1.00	2.04	10.28	10.28
#FFFFFF	2.04	1.00	21.00	21.00
#000000	10.28	21.00	1.00	1.00
##000000	10.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B2BEDD

Deuteranopia (green-blind)

#9EAFDC

Tritanopia (blue-blind)

#00CDCB

Achromatopsia (no color)

#B5B5B5

Design tokens & code

CSS

--color: #51c4dc;
/* rgb */ color: rgb(81, 196, 220);
/* oklch */ color: oklch(76.4% 0.108 213.9);

Tailwind

colors: {
  custom: {
    50: '#90d6e6',
    500: '#51c4dc',
    950: '#000000',
  },
}

SCSS

$custom: #51c4dc;
$custom-light: #90d6e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51c4dc",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 220
  },
  "hsl": {
    "h": 190.36,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.76425,
    "c": 0.10775,
    "h": 213.9
  },
  "luminance": 0.46396
}

Semantic roles & 50–950 ramp

primary

#51C4DC

secondary

#E0B3A9

accent

#5C3EE9

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C4DC

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

Preview Lab → · Contrast checker → · Palette generator →