#51BCE7#51BCE7

#51BCE7 is a light, moderate cyan. Relative luminance 0.435; OKLCH L 75.0% C 0.115 H 227.9°. Best body text is #000000 at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#51BCE7
RGB	rgb(81, 188, 231)
HSL	hsl(197, 76%, 61%)
HSV	hsv(197, 65%, 91%)
CMYK	cmyk(64.9%, 18.6%, 0%, 9.4%)
CIE-LAB	lab(71.88, -17.72, -30.51)
CIE-LCH	lch(71.88, 35.29, 239.85°)
OKLab	oklab(75.02% -0.0772 -0.0853)
OKLCH	oklch(75.02% 0.115 227.9)
XYZ	xyz(35.7946, 43.4815, 82.0921)
Luminance	0.4349 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCE7 #E77C51

analogous

#51E7C7 #51BCE7 #5171E7

triadic

#51BCE7 #E751BC #BCE751

tetradic

#51BCE7 #C751E7 #E77C51 #71E751

square

#51BCE7 #C751E7 #E77C51 #71E751

split-complementary

#51BCE7 #E75171 #E7C751

monochromatic

#177DA7 #1EA6DC #51BCE7 #87D1EE #BDE5F6

Accessibility & contrast

On white

2.17

#51BCE7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.70

#51BCE7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCE7

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCE7	#FFFFFF	#000000	##000000
##51BCE7	1.00	2.17	9.70	9.70
#FFFFFF	2.17	1.00	21.00	21.00
#000000	9.70	21.00	1.00	1.00
##000000	9.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B9E9

Deuteranopia (green-blind)

#90A9E6

Tritanopia (blue-blind)

#00C8CA

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #51bce7;
/* rgb */ color: rgb(81, 188, 231);
/* oklch */ color: oklch(75.0% 0.115 227.9);

Tailwind

colors: {
  custom: {
    50: '#91d0ee',
    500: '#51bce7',
    950: '#000000',
  },
}

SCSS

$custom: #51bce7;
$custom-light: #91d0ee;
$custom-dark: #000000;

JSON

{
  "hex": "#51bce7",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 231
  },
  "hsl": {
    "h": 197.2,
    "s": 75.758,
    "l": 61.176
  },
  "oklch": {
    "l": 0.75019,
    "c": 0.11506,
    "h": 227.9
  },
  "luminance": 0.43485
}

Semantic roles & 50–950 ramp

primary

#51BCE7

secondary

#E6BEAE

accent

#480ED8

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BCE7

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

Preview Lab → · Contrast checker → · Palette generator →