#51BBD2#51BBD2

#51BBD2 is a light, moderate cyan. Relative luminance 0.419; OKLCH L 73.9% C 0.102 H 214.3°. Best body text is #000000 at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#51BBD2
RGB	rgb(81, 187, 210)
HSL	hsl(191, 59%, 57%)
HSV	hsv(191, 61%, 82%)
CMYK	cmyk(61.4%, 11%, 0%, 17.6%)
CIE-LAB	lab(70.83, -23.58, -20.68)
CIE-LCH	lch(70.83, 31.37, 221.25°)
OKLab	oklab(73.93% -0.0841 -0.0574)
OKLCH	oklch(73.93% 0.102 214.3)
XYZ	xyz(32.7918, 41.9397, 67.3273)
Luminance	0.4194 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBD2 #D26851

analogous

#51D2A9 #51BBD2 #517AD2

triadic

#51BBD2 #D251BB #BBD251

tetradic

#51BBD2 #A951D2 #D26851 #7AD251

square

#51BBD2 #A951D2 #D26851 #7AD251

split-complementary

#51BBD2 #D2517A #D2A951

monochromatic

#237486 #2F9EB7 #51BBD2 #82CEDF #B2E1EB

Accessibility & contrast

On white

2.24

#51BBD2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.39

#51BBD2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBD2

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBD2	#FFFFFF	#000000	##000000
##51BBD2	1.00	2.24	9.39	9.39
#FFFFFF	2.24	1.00	21.00	21.00
#000000	9.39	21.00	1.00	1.00
##000000	9.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AAB5D3

Deuteranopia (green-blind)

#97A7D2

Tritanopia (blue-blind)

#00C4C2

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #51bbd2;
/* rgb */ color: rgb(81, 187, 210);
/* oklch */ color: oklch(73.9% 0.102 214.3);

Tailwind

colors: {
  custom: {
    50: '#8fcfdf',
    500: '#51bbd2',
    950: '#000000',
  },
}

SCSS

$custom: #51bbd2;
$custom-light: #8fcfdf;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbd2",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 210
  },
  "hsl": {
    "h": 190.698,
    "s": 58.904,
    "l": 57.059
  },
  "oklch": {
    "l": 0.73925,
    "c": 0.10181,
    "h": 214.3
  },
  "luminance": 0.41943
}

Semantic roles & 50–950 ramp

primary

#51BBD2

secondary

#DAAFA5

accent

#6246E2

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0D1415

muted

#7E8283

Preview Lab

Preview with #51BBD2

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

Preview Lab → · Contrast checker → · Palette generator →