#51BFDF#51BFDF

#51BFDF is a light, moderate cyan. Relative luminance 0.443; OKLCH L 75.4% C 0.109 H 220.3°. Best body text is #000000 at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#51BFDF
RGB	rgb(81, 191, 223)
HSL	hsl(194, 69%, 60%)
HSV	hsv(194, 64%, 87%)
CMYK	cmyk(63.7%, 14.3%, 0%, 12.5%)
CIE-LAB	lab(72.45, -21.73, -25.29)
CIE-LCH	lch(72.45, 33.34, 229.34°)
OKLab	oklab(75.38% -0.0832 -0.0704)
OKLCH	oklch(75.38% 0.109 220.3)
XYZ	xyz(35.3380, 44.3349, 76.4929)
Luminance	0.4434 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BFDF #DF7151

analogous

#51DFB8 #51BFDF #5178DF

triadic

#51BFDF #DF51BF #BFDF51

tetradic

#51BFDF #B851DF #DF7151 #78DF51

square

#51BFDF #B851DF #DF7151 #78DF51

split-complementary

#51BFDF #DF5178 #DFB851

monochromatic

#1C7D99 #26A7CD #51BFDF #85D2E9 #B8E5F2

Accessibility & contrast

On white

2.13

#51BFDF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.87

#51BFDF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BFDF

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BFDF	#FFFFFF	#000000	##000000
##51BFDF	1.00	2.13	9.87	9.87
#FFFFFF	2.13	1.00	21.00	21.00
#000000	9.87	21.00	1.00	1.00
##000000	9.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ABBAE1

Deuteranopia (green-blind)

#97ABDF

Tritanopia (blue-blind)

#00CAC9

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51bfdf;
/* rgb */ color: rgb(81, 191, 223);
/* oklch */ color: oklch(75.4% 0.109 220.3);

Tailwind

colors: {
  custom: {
    50: '#90d2e9',
    500: '#51bfdf',
    950: '#000000',
  },
}

SCSS

$custom: #51bfdf;
$custom-light: #90d2e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51bfdf",
  "rgb": {
    "r": 81,
    "g": 191,
    "b": 223
  },
  "hsl": {
    "h": 193.521,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.75378,
    "c": 0.10901,
    "h": 220.3
  },
  "luminance": 0.44339
}

Semantic roles & 50–950 ramp

primary

#51BFDF

secondary

#E1B7AA

accent

#643CEC

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BFDF

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

Preview Lab → · Contrast checker → · Palette generator →