#51B4E6#51B4E6

#51B4E6 is a light, moderate cyan. Relative luminance 0.401; OKLCH L 73.1% C 0.117 H 233.6°. Best body text is #000000 at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#51B4E6
RGB	rgb(81, 180, 230)
HSL	hsl(200, 75%, 61%)
HSV	hsv(200, 65%, 90%)
CMYK	cmyk(64.8%, 21.7%, 0%, 9.8%)
CIE-LAB	lab(69.54, -13.81, -33.58)
CIE-LCH	lch(69.54, 36.31, 247.65°)
OKLab	oklab(73.14% -0.0694 -0.0941)
OKLCH	oklch(73.14% 0.117 233.6)
XYZ	xyz(33.9920, 40.1015, 80.7965)
Luminance	0.4011 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B4E6 #E68351

analogous

#51E6CD #51B4E6 #5169E6

triadic

#51B4E6 #E651B4 #B4E651

tetradic

#51B4E6 #CD51E6 #E68351 #69E651

square

#51B4E6 #CD51E6 #E68351 #69E651

split-complementary

#51B4E6 #E65169 #E6CD51

monochromatic

#1876A5 #1F9CDA #51B4E6 #87CBEE #BCE2F5

Accessibility & contrast

On white

2.33

#51B4E6 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.02

#51B4E6 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B4E6

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B4E6	#FFFFFF	#000000	##000000
##51B4E6	1.00	2.33	9.02	9.02
#FFFFFF	2.33	1.00	21.00	21.00
#000000	9.02	21.00	1.00	1.00
##000000	9.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB2E8

Deuteranopia (green-blind)

#87A3E5

Tritanopia (blue-blind)

#00C1C5

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #51b4e6;
/* rgb */ color: rgb(81, 180, 230);
/* oklch */ color: oklch(73.1% 0.117 233.6);

Tailwind

colors: {
  custom: {
    50: '#90caee',
    500: '#51b4e6',
    950: '#000000',
  },
}

SCSS

$custom: #51b4e6;
$custom-light: #90caee;
$custom-dark: #000000;

JSON

{
  "hex": "#51b4e6",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 230
  },
  "hsl": {
    "h": 200.134,
    "s": 74.874,
    "l": 60.98
  },
  "oklch": {
    "l": 0.73142,
    "c": 0.11699,
    "h": 233.6
  },
  "luminance": 0.40105
}

Semantic roles & 50–950 ramp

primary

#51B4E6

secondary

#E5C0AD

accent

#520ED7

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B4E6

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

Preview Lab → · Contrast checker → · Palette generator →