#51B8F2#51B8F2

#51B8F2 is a light, vivid cyan. Relative luminance 0.424; OKLCH L 74.6% C 0.126 H 236.7°. Best body text is #000000 at 9.49:1 contrast (WCAG AA passes).

Color values

HEX#51B8F2
RGBrgb(81, 184, 242)
HSLhsl(202, 86%, 63%)
HSVhsv(202, 67%, 95%)
CMYKcmyk(66.5%, 24%, 0%, 5.1%)
CIE-LABlab(71.17, -12.13, -37.58)
CIE-LCHlch(71.17, 39.48, 252.11°)
OKLaboklab(74.6% -0.0694 -0.1056)
OKLCHoklch(74.6% 0.126 236.7)
XYZxyz(36.5546, 42.4372, 90.2519)
Luminance0.4244 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51B8F2 #F28B51
analogous
#51F2DB #51B8F2 #5167F2
triadic
#51B8F2 #F251B8 #B8F251
tetradic
#51B8F2 #DB51F2 #F28B51 #67F251
square
#51B8F2 #DB51F2 #F28B51 #67F251
split-complementary
#51B8F2 #F25167 #F2DB51
monochromatic
#0E7CBB #18A1EE #51B8F2 #8ACFF6 #C3E6FB

Accessibility & contrast

On white

2.21
#51B8F2 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.49
#51B8F2 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B8F2
9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51B8F2#FFFFFF#000000##000000
##51B8F21.002.219.499.49
#FFFFFF2.211.0021.0021.00
#0000009.4921.001.001.00
##0000009.4921.001.001.00

Color blindness preview

Protanopia (red-blind)
#9DB7F5
Deuteranopia (green-blind)
#86A7F1
Tritanopia (blue-blind)
#00C7CC
Achromatopsia (no color)
#AEAEAE

Design tokens & code

CSS
--color: #51b8f2;
/* rgb */ color: rgb(81, 184, 242);
/* oklch */ color: oklch(74.6% 0.126 236.7);
Tailwind
colors: {
  custom: {
    50: '#92cdf6',
    500: '#51b8f2',
    950: '#000000',
  },
}
SCSS
$custom: #51b8f2;
$custom-light: #92cdf6;
$custom-dark: #000000;
JSON
{
  "hex": "#51b8f2",
  "rgb": {
    "r": 81,
    "g": 184,
    "b": 242
  },
  "hsl": {
    "h": 201.615,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.74598,
    "c": 0.1264,
    "h": 236.7
  },
  "luminance": 0.42441
}

Semantic roles & 50–950 ramp

primary
#51B8F2
secondary
#ECC7B3
accent
#5303E3
background
#F9FCFF
surface
#F2F9FE
border
#CCD2D6
text
#0E1317
muted
#7E8285

Preview Lab

Preview with #51B8F2

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

Preview Lab → · Contrast checker → · Palette generator →

#51B8F2 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva