#51BFE5#51BFE5

#51BFE5 is a light, moderate cyan. Relative luminance 0.447; OKLCH L 75.6% C 0.113 H 224.2°. Best body text is #000000 at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#51BFE5
RGB	rgb(81, 191, 229)
HSL	hsl(195, 74%, 61%)
HSV	hsv(195, 65%, 90%)
CMYK	cmyk(64.6%, 16.6%, 0%, 10.2%)
CIE-LAB	lab(72.67, -19.90, -28.21)
CIE-LCH	lch(72.67, 34.52, 234.81°)
OKLab	oklab(75.63% -0.081 -0.0787)
OKLCH	oklch(75.63% 0.113 224.2)
XYZ	xyz(36.1613, 44.6642, 80.8289)
Luminance	0.4467 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BFE5 #E57751

analogous

#51E5C1 #51BFE5 #5175E5

triadic

#51BFE5 #E551BF #BFE551

tetradic

#51BFE5 #C151E5 #E57751 #75E551

square

#51BFE5 #C151E5 #E57751 #75E551

split-complementary

#51BFE5 #E55175 #E5C151

monochromatic

#1880A3 #20A9D8 #51BFE5 #86D3ED #BBE6F5

Accessibility & contrast

On white

2.11

#51BFE5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.93

#51BFE5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BFE5

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BFE5	#FFFFFF	#000000	##000000
##51BFE5	1.00	2.11	9.93	9.93
#FFFFFF	2.11	1.00	21.00	21.00
#000000	9.93	21.00	1.00	1.00
##000000	9.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AABBE7

Deuteranopia (green-blind)

#95ACE5

Tritanopia (blue-blind)

#00CBCB

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51bfe5;
/* rgb */ color: rgb(81, 191, 229);
/* oklch */ color: oklch(75.6% 0.113 224.2);

Tailwind

colors: {
  custom: {
    50: '#91d2ed',
    500: '#51bfe5',
    950: '#000000',
  },
}

SCSS

$custom: #51bfe5;
$custom-light: #91d2ed;
$custom-dark: #000000;

JSON

{
  "hex": "#51bfe5",
  "rgb": {
    "r": 81,
    "g": 191,
    "b": 229
  },
  "hsl": {
    "h": 195.405,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.75625,
    "c": 0.11294,
    "h": 224.2
  },
  "luminance": 0.44668
}

Semantic roles & 50–950 ramp

primary

#51BFE5

secondary

#E5BBAD

accent

#420FD6

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BFE5

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

Preview Lab → · Contrast checker → · Palette generator →