#51AAE9#51AAE9

#51AAE9 is a light, vivid cyan. Relative luminance 0.364; OKLCH L 71.0% C 0.126 H 242.3°. Best body text is #000000 at 8.28:1 contrast (WCAG AA passes).

Color values

HEX#51AAE9
RGBrgb(81, 170, 233)
HSLhsl(205, 78%, 62%)
HSVhsv(205, 65%, 91%)
CMYKcmyk(65.2%, 27%, 0%, 8.6%)
CIE-LABlab(66.81, -7.40, -39.47)
CIE-LCHlch(66.81, 40.16, 259.38°)
OKLaboklab(71.01% -0.0584 -0.1112)
OKLCHoklch(71.01% 0.126 242.3)
XYZxyz(32.4705, 36.3786, 82.3855)
Luminance0.3638 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51AAE9 #E99051
analogous
#51E9DC #51AAE9 #515EE9
triadic
#51AAE9 #E951AA #AAE951
tetradic
#51AAE9 #DC51E9 #E99051 #5EE951
square
#51AAE9 #DC51E9 #E99051 #5EE951
split-complementary
#51AAE9 #E9515E #E9DC51
monochromatic
#166DAA #1C8FE0 #51AAE9 #87C5F0 #BEDFF7

Accessibility & contrast

On white

2.54
#51AAE9 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.28
#51AAE9 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51AAE9
8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51AAE9#FFFFFF#000000##000000
##51AAE91.002.548.288.28
#FFFFFF2.541.0021.0021.00
#0000008.2821.001.001.00
##0000008.2821.001.001.00

Color blindness preview

Protanopia (red-blind)
#8EABEC
Deuteranopia (green-blind)
#799CE8
Tritanopia (blue-blind)
#00B9C0
Achromatopsia (no color)
#A3A3A3

Design tokens & code

CSS
--color: #51aae9;
/* rgb */ color: rgb(81, 170, 233);
/* oklch */ color: oklch(71.0% 0.126 242.3);
Tailwind
colors: {
  custom: {
    50: '#90c3f0',
    500: '#51aae9',
    950: '#000000',
  },
}
SCSS
$custom: #51aae9;
$custom-light: #90c3f0;
$custom-dark: #000000;
JSON
{
  "hex": "#51aae9",
  "rgb": {
    "r": 81,
    "g": 170,
    "b": 233
  },
  "hsl": {
    "h": 204.868,
    "s": 77.551,
    "l": 61.569
  },
  "oklch": {
    "l": 0.71014,
    "c": 0.12562,
    "h": 242.3
  },
  "luminance": 0.36382
}

Semantic roles & 50–950 ramp

primary
#51AAE9
secondary
#E7C6AF
accent
#610CDA
background
#F9FBFE
surface
#F2F7FD
border
#CCD0D5
text
#0E1216
muted
#7E8184

Preview Lab

Preview with #51AAE9

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

Preview Lab → · Contrast checker → · Palette generator →

#51AAE9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva