#51B3CF#51B3CF

#51B3CF is a light, moderate cyan. Relative luminance 0.385; OKLCH L 71.9% C 0.100 H 219.5°. Best body text is #000000 at 8.70:1 contrast (WCAG AA passes).

Color values

HEX	#51B3CF
RGB	rgb(81, 179, 207)
HSL	hsl(193, 57%, 56%)
HSV	hsv(193, 61%, 81%)
CMYK	cmyk(60.9%, 13.5%, 0%, 18.8%)
CIE-LAB	lab(68.38, -20.39, -22.77)
CIE-LCH	lch(68.38, 30.56, 228.16°)
OKLab	oklab(71.93% -0.0768 -0.0633)
OKLCH	oklch(71.93% 0.1 219.5)
XYZ	xyz(30.7714, 38.4914, 64.8273)
Luminance	0.3850 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B3CF #CF6D51

analogous

#51CFAC #51B3CF #5174CF

triadic

#51B3CF #CF51B3 #B3CF51

tetradic

#51B3CF #AC51CF #CF6D51 #74CF51

square

#51B3CF #AC51CF #CF6D51 #74CF51

split-complementary

#51B3CF #CF5174 #CFAC51

monochromatic

#246D82 #3195B2 #51B3CF #81C8DC #B1DDE9

Accessibility & contrast

On white

2.41

#51B3CF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.70

#51B3CF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B3CF

8.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B3CF	#FFFFFF	#000000	##000000
##51B3CF	1.00	2.41	8.70	8.70
#FFFFFF	2.41	1.00	21.00	21.00
#000000	8.70	21.00	1.00	1.00
##000000	8.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2AED1

Deuteranopia (green-blind)

#8FA1CF

Tritanopia (blue-blind)

#00BCBC

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #51b3cf;
/* rgb */ color: rgb(81, 179, 207);
/* oklch */ color: oklch(71.9% 0.100 219.5);

Tailwind

colors: {
  custom: {
    50: '#8ecadd',
    500: '#51b3cf',
    950: '#000000',
  },
}

SCSS

$custom: #51b3cf;
$custom-light: #8ecadd;
$custom-dark: #000000;

JSON

{
  "hex": "#51b3cf",
  "rgb": {
    "r": 81,
    "g": 179,
    "b": 207
  },
  "hsl": {
    "h": 193.333,
    "s": 56.757,
    "l": 56.471
  },
  "oklch": {
    "l": 0.71927,
    "c": 0.09952,
    "h": 219.5
  },
  "luminance": 0.38495
}

Semantic roles & 50–950 ramp

primary

#51B3CF

secondary

#D8B0A4

accent

#6A48E0

background

#F9FCFD

surface

#F2F8FB

border

#CCD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #51B3CF

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

Preview Lab → · Contrast checker → · Palette generator →