#51BDF2#51BDF2

#51BDF2 is a light, vivid cyan. Relative luminance 0.446; OKLCH L 75.7% C 0.124 H 233.2°. Best body text is #000000 at 9.91:1 contrast (WCAG AA passes).

Color values

HEX	#51BDF2
RGB	rgb(81, 189, 242)
HSL	hsl(200, 86%, 63%)
HSV	hsv(200, 67%, 95%)
CMYK	cmyk(66.5%, 21.9%, 0%, 5.1%)
CIE-LAB	lab(72.60, -14.79, -35.37)
CIE-LCH	lch(72.60, 38.33, 247.30°)
OKLab	oklab(75.73% -0.0744 -0.0992)
OKLCH	oklch(75.73% 0.124 233.2)
XYZ	xyz(37.6116, 44.5513, 90.6042)
Luminance	0.4456 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BDF2 #F28651

analogous

#51F2D7 #51BDF2 #516CF2

triadic

#51BDF2 #F251BD #BDF251

tetradic

#51BDF2 #D751F2 #F28651 #6CF251

square

#51BDF2 #D751F2 #F28651 #6CF251

split-complementary

#51BDF2 #F2516C #F2D751

monochromatic

#0E82BB #18A7EE #51BDF2 #8AD3F6 #C3E8FB

Accessibility & contrast

On white

2.12

#51BDF2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.91

#51BDF2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BDF2

9.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BDF2	#FFFFFF	#000000	##000000
##51BDF2	1.00	2.12	9.91	9.91
#FFFFFF	2.12	1.00	21.00	21.00
#000000	9.91	21.00	1.00	1.00
##000000	9.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3BBF5

Deuteranopia (green-blind)

#8DABF1

Tritanopia (blue-blind)

#00CBCF

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51bdf2;
/* rgb */ color: rgb(81, 189, 242);
/* oklch */ color: oklch(75.7% 0.124 233.2);

Tailwind

colors: {
  custom: {
    50: '#92d0f6',
    500: '#51bdf2',
    950: '#000000',
  },
}

SCSS

$custom: #51bdf2;
$custom-light: #92d0f6;
$custom-dark: #000000;

JSON

{
  "hex": "#51bdf2",
  "rgb": {
    "r": 81,
    "g": 189,
    "b": 242
  },
  "hsl": {
    "h": 199.752,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.75731,
    "c": 0.124,
    "h": 233.2
  },
  "luminance": 0.44555
}

Semantic roles & 50–950 ramp

primary

#51BDF2

secondary

#ECC6B3

accent

#4D03E3

background

#F9FCFF

surface

#F2F9FE

border

#CCD2D6

text

#0E1417

muted

#7E8285

Preview Lab

Preview with #51BDF2

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

Preview Lab → · Contrast checker → · Palette generator →