#51BFE0#51BFE0

#51BFE0 is a light, moderate cyan. Relative luminance 0.444; OKLCH L 75.4% C 0.110 H 220.9°. Best body text is #000000 at 9.88:1 contrast (WCAG AA passes).

Color values

HEX	#51BFE0
RGB	rgb(81, 191, 224)
HSL	hsl(194, 70%, 60%)
HSV	hsv(194, 64%, 88%)
CMYK	cmyk(63.8%, 14.7%, 0%, 12.2%)
CIE-LAB	lab(72.49, -21.42, -25.78)
CIE-LCH	lch(72.49, 33.52, 230.27°)
OKLab	oklab(75.42% -0.0828 -0.0718)
OKLCH	oklch(75.42% 0.11 220.9)
XYZ	xyz(35.4732, 44.3890, 77.2050)
Luminance	0.4439 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BFE0 #E07251

analogous

#51E0B9 #51BFE0 #5178E0

triadic

#51BFE0 #E051BF #BFE051

tetradic

#51BFE0 #B951E0 #E07251 #78E051

square

#51BFE0 #B951E0 #E07251 #78E051

split-complementary

#51BFE0 #E05178 #E0B951

monochromatic

#1C7E9B #25A8CF #51BFE0 #85D2E9 #B9E5F3

Accessibility & contrast

On white

2.13

#51BFE0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.88

#51BFE0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BFE0

9.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BFE0	#FFFFFF	#000000	##000000
##51BFE0	1.00	2.13	9.88	9.88
#FFFFFF	2.13	1.00	21.00	21.00
#000000	9.88	21.00	1.00	1.00
##000000	9.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ABBAE2

Deuteranopia (green-blind)

#97ABE0

Tritanopia (blue-blind)

#00CAC9

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51bfe0;
/* rgb */ color: rgb(81, 191, 224);
/* oklch */ color: oklch(75.4% 0.110 220.9);

Tailwind

colors: {
  custom: {
    50: '#90d2e9',
    500: '#51bfe0',
    950: '#000000',
  },
}

SCSS

$custom: #51bfe0;
$custom-light: #90d2e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51bfe0",
  "rgb": {
    "r": 81,
    "g": 191,
    "b": 224
  },
  "hsl": {
    "h": 193.846,
    "s": 69.756,
    "l": 59.804
  },
  "oklch": {
    "l": 0.75419,
    "c": 0.10963,
    "h": 220.9
  },
  "luminance": 0.44393
}

Semantic roles & 50–950 ramp

primary

#51BFE0

secondary

#E2B8AB

accent

#643BED

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BFE0

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

Preview Lab → · Contrast checker → · Palette generator →