#51B0DF#51B0DF

#51B0DF is a light, moderate cyan. Relative luminance 0.381; OKLCH L 71.9% C 0.112 H 232.9°. Best body text is #000000 at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#51B0DF
RGB	rgb(81, 176, 223)
HSL	hsl(200, 69%, 60%)
HSV	hsv(200, 64%, 87%)
CMYK	cmyk(63.7%, 21.1%, 0%, 12.5%)
CIE-LAB	lab(68.11, -13.88, -31.97)
CIE-LCH	lch(68.11, 34.85, 246.54°)
OKLab	oklab(71.91% -0.0678 -0.0895)
OKLCH	oklch(71.91% 0.112 232.9)
XYZ	xyz(32.2328, 38.1244, 75.4578)
Luminance	0.3813 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B0DF #DF8051

analogous

#51DFC7 #51B0DF #5169DF

triadic

#51B0DF #DF51B0 #B0DF51

tetradic

#51B0DF #C751DF #DF8051 #69DF51

square

#51B0DF #C751DF #DF8051 #69DF51

split-complementary

#51B0DF #DF5169 #DFC751

monochromatic

#1C7099 #2696CD #51B0DF #85C7E9 #B8DFF2

Accessibility & contrast

On white

2.43

#51B0DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.63

#51B0DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B0DF

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B0DF	#FFFFFF	#000000	##000000
##51B0DF	1.00	2.43	8.63	8.63
#FFFFFF	2.43	1.00	21.00	21.00
#000000	8.63	21.00	1.00	1.00
##000000	8.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99AEE1

Deuteranopia (green-blind)

#85A0DE

Tritanopia (blue-blind)

#00BDC0

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #51b0df;
/* rgb */ color: rgb(81, 176, 223);
/* oklch */ color: oklch(71.9% 0.112 232.9);

Tailwind

colors: {
  custom: {
    50: '#8fc7e9',
    500: '#51b0df',
    950: '#000000',
  },
}

SCSS

$custom: #51b0df;
$custom-light: #8fc7e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51b0df",
  "rgb": {
    "r": 81,
    "g": 176,
    "b": 223
  },
  "hsl": {
    "h": 199.859,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.71912,
    "c": 0.1123,
    "h": 232.9
  },
  "luminance": 0.38128
}

Semantic roles & 50–950 ramp

primary

#51B0DF

secondary

#E1BDAA

accent

#763CEC

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B0DF

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

Preview Lab → · Contrast checker → · Palette generator →