#51A3E5#51A3E5

#51A3E5 is a light, vivid cyan. Relative luminance 0.336; OKLCH L 69.2% C 0.126 H 245.4°. Best body text is #000000 at 7.72:1 contrast (WCAG AA passes).

Color values

HEX#51A3E5
RGBrgb(81, 163, 229)
HSLhsl(207, 74%, 61%)
HSVhsv(207, 65%, 90%)
CMYKcmyk(64.6%, 28.8%, 0%, 10.2%)
CIE-LABlab(64.64, -4.80, -40.67)
CIE-LCHlch(64.64, 40.95, 263.26°)
OKLaboklab(69.25% -0.0526 -0.1147)
OKLCHoklch(69.25% 0.126 245.4)
XYZxyz(30.6281, 33.5977, 78.9844)
Luminance0.3360 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51A3E5 #E59351
analogous
#51E5DD #51A3E5 #5159E5
triadic
#51A3E5 #E551A3 #A3E551
tetradic
#51A3E5 #DD51E5 #E59351 #59E551
square
#51A3E5 #DD51E5 #E59351 #59E551
split-complementary
#51A3E5 #E55159 #E5DD51
monochromatic
#1865A3 #2086D8 #51A3E5 #86BFED #BBDBF5

Accessibility & contrast

On white

2.72
#51A3E5 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

7.72
#51A3E5 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A3E5
7.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51A3E5#FFFFFF#000000##000000
##51A3E51.002.727.727.72
#FFFFFF2.721.0021.0021.00
#0000007.7221.001.001.00
##0000007.7221.001.001.00

Color blindness preview

Protanopia (red-blind)
#86A5E8
Deuteranopia (green-blind)
#7296E4
Tritanopia (blue-blind)
#00B3BA
Achromatopsia (no color)
#9D9D9D

Design tokens & code

CSS
--color: #51a3e5;
/* rgb */ color: rgb(81, 163, 229);
/* oklch */ color: oklch(69.2% 0.126 245.4);
Tailwind
colors: {
  custom: {
    50: '#90beed',
    500: '#51a3e5',
    950: '#000000',
  },
}
SCSS
$custom: #51a3e5;
$custom-light: #90beed;
$custom-dark: #000000;
JSON
{
  "hex": "#51a3e5",
  "rgb": {
    "r": 81,
    "g": 163,
    "b": 229
  },
  "hsl": {
    "h": 206.757,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.69245,
    "c": 0.1262,
    "h": 245.4
  },
  "luminance": 0.33601
}

Semantic roles & 50–950 ramp

primary
#51A3E5
secondary
#E5C6AD
accent
#680FD6
background
#F9FBFE
surface
#F2F6FD
border
#CCD0D5
text
#0E1216
muted
#7E8184

Preview Lab

Preview with #51A3E5

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

Preview Lab → · Contrast checker → · Palette generator →

#51A3E5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva