#51B2F2#51B2F2

#51B2F2 is a light, vivid cyan. Relative luminance 0.400; OKLCH L 73.2% C 0.130 H 240.7°. Best body text is #000000 at 9.00:1 contrast (WCAG AA passes).

Color values

HEX#51B2F2
RGBrgb(81, 178, 242)
HSLhsl(204, 86%, 63%)
HSVhsv(204, 67%, 95%)
CMYKcmyk(66.5%, 26.4%, 0%, 5.1%)
CIE-LABlab(69.47, -8.87, -40.23)
CIE-LCHlch(69.47, 41.20, 257.56°)
OKLaboklab(73.25% -0.0635 -0.1133)
OKLCHoklch(73.25% 0.13 240.7)
XYZxyz(35.3346, 39.9972, 89.8452)
Luminance0.4000 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51B2F2 #F29151
analogous
#51F2E1 #51B2F2 #5161F2
triadic
#51B2F2 #F251B2 #B2F251
tetradic
#51B2F2 #E151F2 #F29151 #61F251
square
#51B2F2 #E151F2 #F29151 #61F251
split-complementary
#51B2F2 #F25161 #F2E151
monochromatic
#0E76BB #1899EE #51B2F2 #8ACBF6 #C3E4FB

Accessibility & contrast

On white

2.33
#51B2F2 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.00
#51B2F2 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2F2
9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51B2F2#FFFFFF#000000##000000
##51B2F21.002.339.009.00
#FFFFFF2.331.0021.0021.00
#0000009.0021.001.001.00
##0000009.0021.001.001.00

Color blindness preview

Protanopia (red-blind)
#95B2F5
Deuteranopia (green-blind)
#7FA3F1
Tritanopia (blue-blind)
#00C2C8
Achromatopsia (no color)
#AAAAAA

Design tokens & code

CSS
--color: #51b2f2;
/* rgb */ color: rgb(81, 178, 242);
/* oklch */ color: oklch(73.2% 0.130 240.7);
Tailwind
colors: {
  custom: {
    50: '#92c8f6',
    500: '#51b2f2',
    950: '#000000',
  },
}
SCSS
$custom: #51b2f2;
$custom-light: #92c8f6;
$custom-dark: #000000;
JSON
{
  "hex": "#51b2f2",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 242
  },
  "hsl": {
    "h": 203.851,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.73247,
    "c": 0.12993,
    "h": 240.7
  },
  "luminance": 0.40001
}

Semantic roles & 50–950 ramp

primary
#51B2F2
secondary
#ECCAB3
accent
#5C03E3
background
#F9FCFF
surface
#F2F8FE
border
#CCD1D6
text
#0E1317
muted
#7E8285

Preview Lab

Preview with #51B2F2

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

Preview Lab → · Contrast checker → · Palette generator →

#51B2F2 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva