#51BBE0#51BBE0

#51BBE0 is a light, moderate cyan. Relative luminance 0.427; OKLCH L 74.5% C 0.110 H 224.3°. Best body text is #000000 at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#51BBE0
RGB	rgb(81, 187, 224)
HSL	hsl(196, 70%, 60%)
HSV	hsv(196, 64%, 88%)
CMYK	cmyk(63.8%, 16.5%, 0%, 12.2%)
CIE-LAB	lab(71.33, -19.36, -27.56)
CIE-LCH	lch(71.33, 33.68, 234.90°)
OKLab	oklab(74.49% -0.0787 -0.0769)
OKLCH	oklch(74.49% 0.11 224.3)
XYZ	xyz(34.6128, 42.6682, 76.9182)
Luminance	0.4267 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBE0 #E07651

analogous

#51E0BD #51BBE0 #5174E0

triadic

#51BBE0 #E051BB #BBE051

tetradic

#51BBE0 #BD51E0 #E07651 #74E051

square

#51BBE0 #BD51E0 #E07651 #74E051

split-complementary

#51BBE0 #E05174 #E0BD51

monochromatic

#1C7A9B #25A3CF #51BBE0 #85CFE9 #B9E4F3

Accessibility & contrast

On white

2.20

#51BBE0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.53

#51BBE0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBE0

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBE0	#FFFFFF	#000000	##000000
##51BBE0	1.00	2.20	9.53	9.53
#FFFFFF	2.20	1.00	21.00	21.00
#000000	9.53	21.00	1.00	1.00
##000000	9.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A6B7E2

Deuteranopia (green-blind)

#92A8E0

Tritanopia (blue-blind)

#00C6C7

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #51bbe0;
/* rgb */ color: rgb(81, 187, 224);
/* oklch */ color: oklch(74.5% 0.110 224.3);

Tailwind

colors: {
  custom: {
    50: '#90cfe9',
    500: '#51bbe0',
    950: '#000000',
  },
}

SCSS

$custom: #51bbe0;
$custom-light: #90cfe9;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbe0",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 224
  },
  "hsl": {
    "h": 195.524,
    "s": 69.756,
    "l": 59.804
  },
  "oklch": {
    "l": 0.74492,
    "c": 0.11003,
    "h": 224.3
  },
  "luminance": 0.42672
}

Semantic roles & 50–950 ramp

primary

#51BBE0

secondary

#E2B9AB

accent

#693BED

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51BBE0

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

Preview Lab → · Contrast checker → · Palette generator →