#51A0E4#51A0E4

#51A0E4 is a light, vivid cyan. Relative luminance 0.325; OKLCH L 68.5% C 0.127 H 247.0°. Best body text is #000000 at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#51A0E4
RGB	rgb(81, 160, 228)
HSL	hsl(208, 73%, 61%)
HSV	hsv(208, 64%, 89%)
CMYK	cmyk(64.5%, 29.8%, 0%, 10.6%)
CIE-LAB	lab(63.75, -3.44, -41.52)
CIE-LCH	lch(63.75, 41.66, 265.26°)
OKLab	oklab(68.52% -0.0498 -0.1172)
OKLCH	oklch(68.52% 0.127 247)
XYZ	xyz(29.9625, 32.4894, 78.0758)
Luminance	0.3249 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A0E4 #E49551

analogous

#51E4DE #51A0E4 #5156E4

triadic

#51A0E4 #E451A0 #A0E451

tetradic

#51A0E4 #DE51E4 #E49551 #56E451

square

#51A0E4 #DE51E4 #E49551 #56E451

split-complementary

#51A0E4 #E45156 #E4DE51

monochromatic

#1962A2 #2183D7 #51A0E4 #86BDEC #BBDAF4

Accessibility & contrast

On white

2.80

#51A0E4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.50

#51A0E4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A0E4

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A0E4	#FFFFFF	#000000	##000000
##51A0E4	1.00	2.80	7.50	7.50
#FFFFFF	2.80	1.00	21.00	21.00
#000000	7.50	21.00	1.00	1.00
##000000	7.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#82A2E7

Deuteranopia (green-blind)

#6E94E3

Tritanopia (blue-blind)

#00B0B8

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #51a0e4;
/* rgb */ color: rgb(81, 160, 228);
/* oklch */ color: oklch(68.5% 0.127 247.0);

Tailwind

colors: {
  custom: {
    50: '#90bbed',
    500: '#51a0e4',
    950: '#000000',
  },
}

SCSS

$custom: #51a0e4;
$custom-light: #90bbed;
$custom-dark: #000000;

JSON

{
  "hex": "#51a0e4",
  "rgb": {
    "r": 81,
    "g": 160,
    "b": 228
  },
  "hsl": {
    "h": 207.755,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.68524,
    "c": 0.12739,
    "h": 247
  },
  "luminance": 0.32492
}

Semantic roles & 50–950 ramp

primary

#51A0E4

secondary

#E4C6AC

accent

#6B10D5

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1116

muted

#7E8084

Preview Lab

Preview with #51A0E4

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

Preview Lab → · Contrast checker → · Palette generator →