#51B1DF#51B1DF

#51B1DF is a light, moderate cyan. Relative luminance 0.385; OKLCH L 72.1% C 0.112 H 232.1°. Best body text is #000000 at 8.70:1 contrast (WCAG AA passes).

Color values

HEX	#51B1DF
RGB	rgb(81, 177, 223)
HSL	hsl(199, 69%, 60%)
HSV	hsv(199, 64%, 87%)
CMYK	cmyk(63.7%, 20.6%, 0%, 12.5%)
CIE-LAB	lab(68.40, -14.41, -31.52)
CIE-LCH	lch(68.40, 34.66, 245.43°)
OKLab	oklab(72.14% -0.0688 -0.0882)
OKLCH	oklch(72.14% 0.112 232.1)
XYZ	xyz(32.4296, 38.5180, 75.5234)
Luminance	0.3852 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B1DF #DF7F51

analogous

#51DFC6 #51B1DF #516ADF

triadic

#51B1DF #DF51B1 #B1DF51

tetradic

#51B1DF #C651DF #DF7F51 #6ADF51

square

#51B1DF #C651DF #DF7F51 #6ADF51

split-complementary

#51B1DF #DF516A #DFC651

monochromatic

#1C7199 #2697CD #51B1DF #85C8E9 #B8DFF2

Accessibility & contrast

On white

2.41

#51B1DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.70

#51B1DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B1DF

8.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B1DF	#FFFFFF	#000000	##000000
##51B1DF	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)

#9AAFE1

Deuteranopia (green-blind)

#87A0DE

Tritanopia (blue-blind)

#00BDC0

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #51b1df;
/* rgb */ color: rgb(81, 177, 223);
/* oklch */ color: oklch(72.1% 0.112 232.1);

Tailwind

colors: {
  custom: {
    50: '#8fc8e9',
    500: '#51b1df',
    950: '#000000',
  },
}

SCSS

$custom: #51b1df;
$custom-light: #8fc8e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51b1df",
  "rgb": {
    "r": 81,
    "g": 177,
    "b": 223
  },
  "hsl": {
    "h": 199.437,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.72142,
    "c": 0.11191,
    "h": 232.1
  },
  "luminance": 0.38521
}

Semantic roles & 50–950 ramp

primary

#51B1DF

secondary

#E1BCAA

accent

#753CEC

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B1DF

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

Preview Lab → · Contrast checker → · Palette generator →