#51A6E4#51A6E4

#51A6E4 is a light, vivid cyan. Relative luminance 0.346; OKLCH L 69.9% C 0.123 H 242.9°. Best body text is #000000 at 7.92:1 contrast (WCAG AA passes).

Color values

HEX	#51A6E4
RGB	rgb(81, 166, 228)
HSL	hsl(205, 73%, 61%)
HSV	hsv(205, 64%, 89%)
CMYK	cmyk(64.5%, 27.2%, 0%, 10.6%)
CIE-LAB	lab(65.45, -6.81, -38.85)
CIE-LCH	lch(65.45, 39.44, 260.06°)
OKLab	oklab(69.87% -0.0559 -0.1094)
OKLCH	oklch(69.87% 0.123 242.9)
XYZ	xyz(31.0279, 34.6200, 78.4309)
Luminance	0.3462 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A6E4 #E48F51

analogous

#51E4D8 #51A6E4 #515CE4

triadic

#51A6E4 #E451A6 #A6E451

tetradic

#51A6E4 #D851E4 #E48F51 #5CE451

square

#51A6E4 #D851E4 #E48F51 #5CE451

split-complementary

#51A6E4 #E4515C #E4D851

monochromatic

#1968A2 #218AD7 #51A6E4 #86C1EC #BBDCF4

Accessibility & contrast

On white

2.65

#51A6E4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.92

#51A6E4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A6E4

7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A6E4	#FFFFFF	#000000	##000000
##51A6E4	1.00	2.65	7.92	7.92
#FFFFFF	2.65	1.00	21.00	21.00
#000000	7.92	21.00	1.00	1.00
##000000	7.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8AA7E7

Deuteranopia (green-blind)

#7699E3

Tritanopia (blue-blind)

#00B5BB

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #51a6e4;
/* rgb */ color: rgb(81, 166, 228);
/* oklch */ color: oklch(69.9% 0.123 242.9);

Tailwind

colors: {
  custom: {
    50: '#90c0ec',
    500: '#51a6e4',
    950: '#000000',
  },
}

SCSS

$custom: #51a6e4;
$custom-light: #90c0ec;
$custom-dark: #000000;

JSON

{
  "hex": "#51a6e4",
  "rgb": {
    "r": 81,
    "g": 166,
    "b": 228
  },
  "hsl": {
    "h": 205.306,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.6987,
    "c": 0.12289,
    "h": 242.9
  },
  "luminance": 0.34623
}

Semantic roles & 50–950 ramp

primary

#51A6E4

secondary

#E4C4AC

accent

#6310D5

background

#F9FBFE

surface

#F2F7FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A6E4

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

Preview Lab → · Contrast checker → · Palette generator →