#51B4F2#51B4F2

#51B4F2 is a light, vivid cyan. Relative luminance 0.408; OKLCH L 73.7% C 0.129 H 239.4°. Best body text is #000000 at 9.16:1 contrast (WCAG AA passes).

Color values

HEX#51B4F2
RGBrgb(81, 180, 242)
HSLhsl(203, 86%, 63%)
HSVhsv(203, 67%, 95%)
CMYKcmyk(66.5%, 25.6%, 0%, 5.1%)
CIE-LABlab(70.03, -9.96, -39.35)
CIE-LCHlch(70.03, 40.59, 255.79°)
OKLaboklab(73.7% -0.0655 -0.1108)
OKLCHoklch(73.7% 0.129 239.4)
XYZxyz(35.7354, 40.7989, 89.9788)
Luminance0.4080 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51B4F2 #F28F51
analogous
#51F2E0 #51B4F2 #5163F2
triadic
#51B4F2 #F251B4 #B4F251
tetradic
#51B4F2 #E051F2 #F28F51 #63F251
square
#51B4F2 #E051F2 #F28F51 #63F251
split-complementary
#51B4F2 #F25163 #F2E051
monochromatic
#0E78BB #189BEE #51B4F2 #8ACDF6 #C3E5FB

Accessibility & contrast

On white

2.29
#51B4F2 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.16
#51B4F2 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B4F2
9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51B4F2#FFFFFF#000000##000000
##51B4F21.002.299.169.16
#FFFFFF2.291.0021.0021.00
#0000009.1621.001.001.00
##0000009.1621.001.001.00

Color blindness preview

Protanopia (red-blind)
#97B4F5
Deuteranopia (green-blind)
#81A4F1
Tritanopia (blue-blind)
#00C4C9
Achromatopsia (no color)
#ABABAB

Design tokens & code

CSS
--color: #51b4f2;
/* rgb */ color: rgb(81, 180, 242);
/* oklch */ color: oklch(73.7% 0.129 239.4);
Tailwind
colors: {
  custom: {
    50: '#92caf6',
    500: '#51b4f2',
    950: '#000000',
  },
}
SCSS
$custom: #51b4f2;
$custom-light: #92caf6;
$custom-dark: #000000;
JSON
{
  "hex": "#51b4f2",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 242
  },
  "hsl": {
    "h": 203.106,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.73696,
    "c": 0.12868,
    "h": 239.4
  },
  "luminance": 0.40803
}

Semantic roles & 50–950 ramp

primary
#51B4F2
secondary
#ECC9B3
accent
#5903E3
background
#F9FCFF
surface
#F2F8FE
border
#CCD1D6
text
#0E1317
muted
#7E8285

Preview Lab

Preview with #51B4F2

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

Preview Lab → · Contrast checker → · Palette generator →

#51B4F2 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva