#51A8CF#51A8CF

#51A8CF is a light, moderate cyan. Relative luminance 0.343; OKLCH L 69.4% C 0.101 H 229.9°. Best body text is #000000 at 7.85:1 contrast (WCAG AA passes).

Color values

HEX	#51A8CF
RGB	rgb(81, 168, 207)
HSL	hsl(199, 57%, 56%)
HSV	hsv(199, 61%, 81%)
CMYK	cmyk(60.9%, 18.8%, 0%, 18.8%)
CIE-LAB	lab(65.17, -14.59, -27.70)
CIE-LCH	lch(65.17, 31.31, 242.22°)
OKLab	oklab(69.36% -0.0651 -0.0773)
OKLCH	oklch(69.36% 0.101 229.9)
XYZ	xyz(28.6541, 34.2568, 64.1215)
Luminance	0.3426 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A8CF #CF7851

analogous

#51CFB7 #51A8CF #5169CF

triadic

#51A8CF #CF51A8 #A8CF51

tetradic

#51A8CF #B751CF #CF7851 #69CF51

square

#51A8CF #B751CF #CF7851 #69CF51

split-complementary

#51A8CF #CF5169 #CFB751

monochromatic

#246582 #318AB2 #51A8CF #81C0DC #B1D8E9

Accessibility & contrast

On white

2.67

#51A8CF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.85

#51A8CF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A8CF

7.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A8CF	#FFFFFF	#000000	##000000
##51A8CF	1.00	2.67	7.85	7.85
#FFFFFF	2.67	1.00	21.00	21.00
#000000	7.85	21.00	1.00	1.00
##000000	7.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#94A6D1

Deuteranopia (green-blind)

#8298CE

Tritanopia (blue-blind)

#00B3B5

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51a8cf;
/* rgb */ color: rgb(81, 168, 207);
/* oklch */ color: oklch(69.4% 0.101 229.9);

Tailwind

colors: {
  custom: {
    50: '#8dc1dd',
    500: '#51a8cf',
    950: '#000000',
  },
}

SCSS

$custom: #51a8cf;
$custom-light: #8dc1dd;
$custom-dark: #000000;

JSON

{
  "hex": "#51a8cf",
  "rgb": {
    "r": 81,
    "g": 168,
    "b": 207
  },
  "hsl": {
    "h": 198.571,
    "s": 56.757,
    "l": 56.471
  },
  "oklch": {
    "l": 0.69359,
    "c": 0.10107,
    "h": 229.9
  },
  "luminance": 0.3426
}

Semantic roles & 50–950 ramp

primary

#51A8CF

secondary

#D8B4A4

accent

#7748E0

background

#F9FBFD

surface

#F1F7FB

border

#CBD0D4

text

#0D1215

muted

#7E8183

Preview Lab

Preview with #51A8CF

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

Preview Lab → · Contrast checker → · Palette generator →