#51BFD8#51BFD8

#51BFD8 is a light, moderate cyan. Relative luminance 0.440; OKLCH L 75.1% C 0.105 H 215.3°. Best body text is #000000 at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#51BFD8
RGB	rgb(81, 191, 216)
HSL	hsl(191, 63%, 58%)
HSV	hsv(191, 63%, 85%)
CMYK	cmyk(62.5%, 11.6%, 0%, 15.3%)
CIE-LAB	lab(72.21, -23.83, -21.86)
CIE-LCH	lch(72.21, 32.34, 222.54°)
OKLab	oklab(75.1% -0.0859 -0.0607)
OKLCH	oklch(75.1% 0.105 215.3)
XYZ	xyz(34.4137, 43.9652, 71.6249)
Luminance	0.4397 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BFD8 #D86A51

analogous

#51D8AD #51BFD8 #517BD8

triadic

#51BFD8 #D851BF #BFD851

tetradic

#51BFD8 #AD51D8 #D86A51 #7BD851

square

#51BFD8 #AD51D8 #D86A51 #7BD851

split-complementary

#51BFD8 #D8517B #D8AD51

monochromatic

#207A8F #2BA5C1 #51BFD8 #83D1E3 #B5E4EE

Accessibility & contrast

On white

2.14

#51BFD8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.79

#51BFD8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BFD8

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BFD8	#FFFFFF	#000000	##000000
##51BFD8	1.00	2.14	9.79	9.79
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.79	21.00	1.00	1.00
##000000	9.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADB9D9

Deuteranopia (green-blind)

#9AABD8

Tritanopia (blue-blind)

#00C8C7

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bfd8;
/* rgb */ color: rgb(81, 191, 216);
/* oklch */ color: oklch(75.1% 0.105 215.3);

Tailwind

colors: {
  custom: {
    50: '#90d2e4',
    500: '#51bfd8',
    950: '#000000',
  },
}

SCSS

$custom: #51bfd8;
$custom-light: #90d2e4;
$custom-dark: #000000;

JSON

{
  "hex": "#51bfd8",
  "rgb": {
    "r": 81,
    "g": 191,
    "b": 216
  },
  "hsl": {
    "h": 191.111,
    "s": 63.38,
    "l": 58.235
  },
  "oklch": {
    "l": 0.75099,
    "c": 0.1052,
    "h": 215.3
  },
  "luminance": 0.43969
}

Semantic roles & 50–950 ramp

primary

#51BFD8

secondary

#DDB1A8

accent

#6041E6

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51BFD8

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

Preview Lab → · Contrast checker → · Palette generator →