#51BCD9#51BCD9

#51BCD9 is a light, moderate cyan. Relative luminance 0.427; OKLCH L 74.4% C 0.105 H 218.7°. Best body text is #000000 at 9.55:1 contrast (WCAG AA passes).

Color values

HEX	#51BCD9
RGB	rgb(81, 188, 217)
HSL	hsl(193, 64%, 58%)
HSV	hsv(193, 63%, 85%)
CMYK	cmyk(62.7%, 13.4%, 0%, 14.9%)
CIE-LAB	lab(71.37, -22.00, -23.69)
CIE-LCH	lch(71.37, 32.33, 227.11°)
OKLab	oklab(74.44% -0.0824 -0.0659)
OKLCH	oklch(74.44% 0.106 218.7)
XYZ	xyz(33.8959, 42.7220, 72.0920)
Luminance	0.4273 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCD9 #D96E51

analogous

#51D9B2 #51BCD9 #5178D9

triadic

#51BCD9 #D951BC #BCD951

tetradic

#51BCD9 #B251D9 #D96E51 #78D951

square

#51BCD9 #B251D9 #D96E51 #78D951

split-complementary

#51BCD9 #D95178 #D9B251

monochromatic

#1F7890 #2AA2C2 #51BCD9 #83CFE4 #B5E3EF

Accessibility & contrast

On white

2.20

#51BCD9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.55

#51BCD9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCD9

9.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCD9	#FFFFFF	#000000	##000000
##51BCD9	1.00	2.20	9.55	9.55
#FFFFFF	2.20	1.00	21.00	21.00
#000000	9.55	21.00	1.00	1.00
##000000	9.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AAB7DB

Deuteranopia (green-blind)

#96A8D9

Tritanopia (blue-blind)

#00C6C5

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #51bcd9;
/* rgb */ color: rgb(81, 188, 217);
/* oklch */ color: oklch(74.4% 0.105 218.7);

Tailwind

colors: {
  custom: {
    50: '#8fd0e4',
    500: '#51bcd9',
    950: '#000000',
  },
}

SCSS

$custom: #51bcd9;
$custom-light: #8fd0e4;
$custom-dark: #000000;

JSON

{
  "hex": "#51bcd9",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 217
  },
  "hsl": {
    "h": 192.794,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.74437,
    "c": 0.1055,
    "h": 218.7
  },
  "luminance": 0.42726
}

Semantic roles & 50–950 ramp

primary

#51BCD9

secondary

#DEB3A8

accent

#6441E7

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51BCD9

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

Preview Lab → · Contrast checker → · Palette generator →