#51AEE4#51AEE4

#51AEE4 is a light, moderate cyan. Relative luminance 0.376; OKLCH L 71.7% C 0.118 H 237.1°. Best body text is #000000 at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#51AEE4
RGB	rgb(81, 174, 228)
HSL	hsl(202, 73%, 61%)
HSV	hsv(202, 64%, 89%)
CMYK	cmyk(64.5%, 23.7%, 0%, 10.6%)
CIE-LAB	lab(67.74, -11.21, -35.29)
CIE-LCH	lch(67.74, 37.02, 252.38°)
OKLab	oklab(71.68% -0.064 -0.0991)
OKLCH	oklch(71.68% 0.118 237.1)
XYZ	xyz(32.5276, 37.6195, 78.9308)
Luminance	0.3762 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51AEE4 #E48751

analogous

#51E4D0 #51AEE4 #5164E4

triadic

#51AEE4 #E451AE #AEE451

tetradic

#51AEE4 #D051E4 #E48751 #64E451

square

#51AEE4 #D051E4 #E48751 #64E451

split-complementary

#51AEE4 #E45164 #E4D051

monochromatic

#196FA2 #2194D7 #51AEE4 #86C7EC #BBDFF4

Accessibility & contrast

On white

2.46

#51AEE4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.52

#51AEE4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51AEE4

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51AEE4	#FFFFFF	#000000	##000000
##51AEE4	1.00	2.46	8.52	8.52
#FFFFFF	2.46	1.00	21.00	21.00
#000000	8.52	21.00	1.00	1.00
##000000	8.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95ADE7

Deuteranopia (green-blind)

#809FE3

Tritanopia (blue-blind)

#00BCC0

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #51aee4;
/* rgb */ color: rgb(81, 174, 228);
/* oklch */ color: oklch(71.7% 0.118 237.1);

Tailwind

colors: {
  custom: {
    50: '#90c6ec',
    500: '#51aee4',
    950: '#000000',
  },
}

SCSS

$custom: #51aee4;
$custom-light: #90c6ec;
$custom-dark: #000000;

JSON

{
  "hex": "#51aee4",
  "rgb": {
    "r": 81,
    "g": 174,
    "b": 228
  },
  "hsl": {
    "h": 202.041,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.71682,
    "c": 0.11798,
    "h": 237.1
  },
  "luminance": 0.37623
}

Semantic roles & 50–950 ramp

primary

#51AEE4

secondary

#E4C1AC

accent

#5910D5

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51AEE4

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

Preview Lab → · Contrast checker → · Palette generator →