#51B2D2#51B2D2

#51B2D2 is a light, moderate cyan. Relative luminance 0.382; OKLCH L 71.8% C 0.101 H 222.7°. Best body text is #000000 at 8.65:1 contrast (WCAG AA passes).

Color values

HEX#51B2D2
RGBrgb(81, 178, 210)
HSLhsl(195, 59%, 57%)
HSVhsv(195, 61%, 82%)
CMYKcmyk(61.4%, 15.2%, 0%, 17.6%)
CIE-LABlab(68.20, -18.96, -24.70)
CIE-LCHlch(68.20, 31.14, 232.49°)
OKLaboklab(71.82% -0.0746 -0.0688)
OKLCHoklch(71.82% 0.101 222.7)
XYZxyz(30.9420, 38.2401, 66.7107)
Luminance0.3824 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51B2D2 #D27151
analogous
#51D2B2 #51B2D2 #5172D2
triadic
#51B2D2 #D251B2 #B2D251
tetradic
#51B2D2 #B251D2 #D27151 #72D251
square
#51B2D2 #B251D2 #D27151 #72D251
split-complementary
#51B2D2 #D25172 #D2B251
monochromatic
#236D86 #2F95B7 #51B2D2 #82C8DF #B2DDEB

Accessibility & contrast

On white

2.43
#51B2D2 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.65
#51B2D2 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2D2
8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51B2D2#FFFFFF#000000##000000
##51B2D21.002.438.658.65
#FFFFFF2.431.0021.0021.00
#0000008.6521.001.001.00
##0000008.6521.001.001.00

Color blindness preview

Protanopia (red-blind)
#9FAED4
Deuteranopia (green-blind)
#8DA0D2
Tritanopia (blue-blind)
#00BCBC
Achromatopsia (no color)
#A6A6A6

Design tokens & code

CSS
--color: #51b2d2;
/* rgb */ color: rgb(81, 178, 210);
/* oklch */ color: oklch(71.8% 0.101 222.7);
Tailwind
colors: {
  custom: {
    50: '#8ec9df',
    500: '#51b2d2',
    950: '#000000',
  },
}
SCSS
$custom: #51b2d2;
$custom-light: #8ec9df;
$custom-dark: #000000;
JSON
{
  "hex": "#51b2d2",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 210
  },
  "hsl": {
    "h": 194.884,
    "s": 58.904,
    "l": 57.059
  },
  "oklch": {
    "l": 0.71816,
    "c": 0.10145,
    "h": 222.7
  },
  "luminance": 0.38243
}

Semantic roles & 50–950 ramp

primary
#51B2D2
secondary
#DAB2A5
accent
#6C46E2
background
#F9FCFD
surface
#F2F8FB
border
#CCD1D4
text
#0D1315
muted
#7E8283

Preview Lab

Preview with #51B2D2

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

Preview Lab → · Contrast checker → · Palette generator →

#51B2D2 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva