#51BBDD#51BBDD

#51BBDD is a light, moderate cyan. Relative luminance 0.425; OKLCH L 74.4% C 0.108 H 222.3°. Best body text is #000000 at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#51BBDD
RGB	rgb(81, 187, 221)
HSL	hsl(195, 67%, 59%)
HSV	hsv(195, 63%, 87%)
CMYK	cmyk(63.3%, 15.4%, 0%, 13.3%)
CIE-LAB	lab(71.22, -20.28, -26.09)
CIE-LCH	lch(71.22, 33.05, 232.14°)
OKLab	oklab(74.37% -0.0798 -0.0727)
OKLCH	oklch(74.37% 0.108 222.3)
XYZ	xyz(34.2096, 42.5069, 74.7944)
Luminance	0.4251 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBDD #DD7351

analogous

#51DDB9 #51BBDD #5175DD

triadic

#51BBDD #DD51BB #BBDD51

tetradic

#51BBDD #B951DD #DD7351 #75DD51

square

#51BBDD #B951DD #DD7351 #75DD51

split-complementary

#51BBDD #DD5175 #DDB951

monochromatic

#1D7996 #27A2C9 #51BBDD #84CFE7 #B7E3F1

Accessibility & contrast

On white

2.21

#51BBDD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.50

#51BBDD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBDD

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBDD	#FFFFFF	#000000	##000000
##51BBDD	1.00	2.21	9.50	9.50
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.50	21.00	1.00	1.00
##000000	9.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7B7DF

Deuteranopia (green-blind)

#93A8DD

Tritanopia (blue-blind)

#00C6C6

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51bbdd;
/* rgb */ color: rgb(81, 187, 221);
/* oklch */ color: oklch(74.4% 0.108 222.3);

Tailwind

colors: {
  custom: {
    50: '#90cfe7',
    500: '#51bbdd',
    950: '#000000',
  },
}

SCSS

$custom: #51bbdd;
$custom-light: #90cfe7;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbdd",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 221
  },
  "hsl": {
    "h": 194.571,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.74367,
    "c": 0.10799,
    "h": 222.3
  },
  "luminance": 0.4251
}

Semantic roles & 50–950 ramp

primary

#51BBDD

secondary

#E0B7AA

accent

#683EEA

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BBDD

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

Preview Lab → · Contrast checker → · Palette generator →