#51BBD9#51BBD9

#51BBD9 is a light, moderate cyan. Relative luminance 0.423; OKLCH L 74.2% C 0.105 H 219.5°. Best body text is #000000 at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#51BBD9
RGB	rgb(81, 187, 217)
HSL	hsl(193, 64%, 58%)
HSV	hsv(193, 63%, 85%)
CMYK	cmyk(62.7%, 13.8%, 0%, 14.9%)
CIE-LAB	lab(71.07, -21.49, -24.13)
CIE-LCH	lch(71.07, 32.31, 228.31°)
OKLab	oklab(74.2% -0.0813 -0.0672)
OKLCH	oklch(74.2% 0.105 219.5)
XYZ	xyz(33.6830, 42.2962, 72.0210)
Luminance	0.4230 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBD9 #D96F51

analogous

#51D9B3 #51BBD9 #5177D9

triadic

#51BBD9 #D951BB #BBD951

tetradic

#51BBD9 #B351D9 #D96F51 #77D951

square

#51BBD9 #B351D9 #D96F51 #77D951

split-complementary

#51BBD9 #D95177 #D9B351

monochromatic

#1F7790 #2AA1C2 #51BBD9 #83CFE4 #B5E2EF

Accessibility & contrast

On white

2.22

#51BBD9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.46

#51BBD9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBD9

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBD9	#FFFFFF	#000000	##000000
##51BBD9	1.00	2.22	9.46	9.46
#FFFFFF	2.22	1.00	21.00	21.00
#000000	9.46	21.00	1.00	1.00
##000000	9.46	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A8B6DB

Deuteranopia (green-blind)

#95A8D9

Tritanopia (blue-blind)

#00C5C4

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51bbd9;
/* rgb */ color: rgb(81, 187, 217);
/* oklch */ color: oklch(74.2% 0.105 219.5);

Tailwind

colors: {
  custom: {
    50: '#8fcfe4',
    500: '#51bbd9',
    950: '#000000',
  },
}

SCSS

$custom: #51bbd9;
$custom-light: #8fcfe4;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbd9",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 217
  },
  "hsl": {
    "h": 193.235,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.74204,
    "c": 0.10549,
    "h": 219.5
  },
  "luminance": 0.423
}

Semantic roles & 50–950 ramp

primary

#51BBD9

secondary

#DEB4A8

accent

#6541E7

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51BBD9

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

Preview Lab → · Contrast checker → · Palette generator →