#51D7F4#51D7F4

#51D7F4 is a light, vivid cyan. Relative luminance 0.569; OKLCH L 81.8% C 0.121 H 214.9°. Best body text is #000000 at 12.38:1 contrast (WCAG AA passes).

Color values

HEX	#51D7F4
RGB	rgb(81, 215, 244)
HSL	hsl(191, 88%, 64%)
HSV	hsv(191, 67%, 96%)
CMYK	cmyk(66.8%, 11.9%, 0%, 4.3%)
CIE-LAB	lab(80.11, -27.43, -24.88)
CIE-LCH	lch(80.11, 37.04, 222.21°)
OKLab	oklab(81.77% -0.0992 -0.0693)
OKLCH	oklch(81.77% 0.121 214.9)
XYZ	xyz(44.0161, 56.8770, 94.2290)
Luminance	0.5688 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D7F4 #F46E51

analogous

#51F4BF #51D7F4 #5185F4

triadic

#51D7F4 #F451D7 #D7F451

tetradic

#51D7F4 #BF51F4 #F46E51 #85F451

square

#51D7F4 #BF51F4 #F46E51 #85F451

split-complementary

#51D7F4 #F45185 #F4BF51

monochromatic

#0C9FBF #17CAF0 #51D7F4 #8BE4F8 #C4F1FB

Accessibility & contrast

On white

1.70

#51D7F4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.38

#51D7F4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D7F4

12.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D7F4	#FFFFFF	#000000	##000000
##51D7F4	1.00	1.70	12.38	12.38
#FFFFFF	1.70	1.00	21.00	21.00
#000000	12.38	21.00	1.00	1.00
##000000	12.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C2D0F6

Deuteranopia (green-blind)

#ABBFF4

Tritanopia (blue-blind)

#00E2E0

Achromatopsia (no color)

#C7C7C7

Design tokens & code

CSS

--color: #51d7f4;
/* rgb */ color: rgb(81, 215, 244);
/* oklch */ color: oklch(81.8% 0.121 214.9);

Tailwind

colors: {
  custom: {
    50: '#94e3f7',
    500: '#51d7f4',
    950: '#000000',
  },
}

SCSS

$custom: #51d7f4;
$custom-light: #94e3f7;
$custom-dark: #000000;

JSON

{
  "hex": "#51d7f4",
  "rgb": {
    "r": 81,
    "g": 215,
    "b": 244
  },
  "hsl": {
    "h": 190.675,
    "s": 88.108,
    "l": 63.725
  },
  "oklch": {
    "l": 0.81769,
    "c": 0.12102,
    "h": 214.9
  },
  "luminance": 0.56882
}

Semantic roles & 50–950 ramp

primary

#51D7F4

secondary

#BD462D

accent

#2901E5

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #51D7F4

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

Preview Lab → · Contrast checker → · Palette generator →