#51A3E6#51A3E6

#51A3E6 is a light, vivid cyan. Relative luminance 0.337; OKLCH L 69.3% C 0.127 H 245.8°. Best body text is #000000 at 7.73:1 contrast (WCAG AA passes).

Color values

HEX	#51A3E6
RGB	rgb(81, 163, 230)
HSL	hsl(207, 75%, 61%)
HSV	hsv(207, 65%, 90%)
CMYK	cmyk(64.8%, 29.1%, 0%, 9.8%)
CIE-LAB	lab(64.69, -4.47, -41.15)
CIE-LCH	lch(64.69, 41.39, 263.79°)
OKLab	oklab(69.3% -0.0523 -0.1161)
OKLCH	oklch(69.3% 0.127 245.8)
XYZ	xyz(30.7681, 33.6538, 79.7219)
Luminance	0.3366 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A3E6 #E69451

analogous

#51E6DE #51A3E6 #5158E6

triadic

#51A3E6 #E651A3 #A3E651

tetradic

#51A3E6 #DE51E6 #E69451 #58E651

square

#51A3E6 #DE51E6 #E69451 #58E651

split-complementary

#51A3E6 #E65158 #E6DE51

monochromatic

#1865A5 #1F86DA #51A3E6 #87BFEE #BCDCF5

Accessibility & contrast

On white

2.72

#51A3E6 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.73

#51A3E6 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A3E6

7.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A3E6	#FFFFFF	#000000	##000000
##51A3E6	1.00	2.72	7.73	7.73
#FFFFFF	2.72	1.00	21.00	21.00
#000000	7.73	21.00	1.00	1.00
##000000	7.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#85A5E9

Deuteranopia (green-blind)

#7196E5

Tritanopia (blue-blind)

#00B3BB

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #51a3e6;
/* rgb */ color: rgb(81, 163, 230);
/* oklch */ color: oklch(69.3% 0.127 245.8);

Tailwind

colors: {
  custom: {
    50: '#90beee',
    500: '#51a3e6',
    950: '#000000',
  },
}

SCSS

$custom: #51a3e6;
$custom-light: #90beee;
$custom-dark: #000000;

JSON

{
  "hex": "#51a3e6",
  "rgb": {
    "r": 81,
    "g": 163,
    "b": 230
  },
  "hsl": {
    "h": 206.98,
    "s": 74.874,
    "l": 60.98
  },
  "oklch": {
    "l": 0.69295,
    "c": 0.12734,
    "h": 245.8
  },
  "luminance": 0.33657
}

Semantic roles & 50–950 ramp

primary

#51A3E6

secondary

#E5C7AD

accent

#690ED7

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A3E6

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

Preview Lab → · Contrast checker → · Palette generator →