#51D5F2#51D5F2

#51D5F2 is a light, moderate cyan. Relative luminance 0.557; OKLCH L 81.2% C 0.120 H 215.1°. Best body text is #000000 at 12.15:1 contrast (WCAG AA passes).

Color values

HEX	#51D5F2
RGB	rgb(81, 213, 242)
HSL	hsl(191, 86%, 63%)
HSV	hsv(191, 67%, 95%)
CMYK	cmyk(66.5%, 12%, 0%, 5.1%)
CIE-LAB	lab(79.47, -27.04, -24.80)
CIE-LCH	lch(79.47, 36.69, 222.52°)
OKLab	oklab(81.23% -0.098 -0.069)
OKLCH	oklch(81.23% 0.12 215.1)
XYZ	xyz(43.2079, 55.7438, 92.4697)
Luminance	0.5575 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D5F2 #F26E51

analogous

#51F2BE #51D5F2 #5185F2

triadic

#51D5F2 #F251D5 #D5F251

tetradic

#51D5F2 #BE51F2 #F26E51 #85F251

square

#51D5F2 #BE51F2 #F26E51 #85F251

split-complementary

#51D5F2 #F25185 #F2BE51

monochromatic

#0E9CBB #18C7EE #51D5F2 #8AE3F6 #C3F0FB

Accessibility & contrast

On white

1.73

#51D5F2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.15

#51D5F2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D5F2

12.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D5F2	#FFFFFF	#000000	##000000
##51D5F2	1.00	1.73	12.15	12.15
#FFFFFF	1.73	1.00	21.00	21.00
#000000	12.15	21.00	1.00	1.00
##000000	12.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C1CFF4

Deuteranopia (green-blind)

#AABEF2

Tritanopia (blue-blind)

#00E0DE

Achromatopsia (no color)

#C5C5C5

Design tokens & code

CSS

--color: #51d5f2;
/* rgb */ color: rgb(81, 213, 242);
/* oklch */ color: oklch(81.2% 0.120 215.1);

Tailwind

colors: {
  custom: {
    50: '#94e2f6',
    500: '#51d5f2',
    950: '#000000',
  },
}

SCSS

$custom: #51d5f2;
$custom-light: #94e2f6;
$custom-dark: #000000;

JSON

{
  "hex": "#51d5f2",
  "rgb": {
    "r": 81,
    "g": 213,
    "b": 242
  },
  "hsl": {
    "h": 190.807,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.8123,
    "c": 0.1199,
    "h": 215.1
  },
  "luminance": 0.55749
}

Semantic roles & 50–950 ramp

primary

#51D5F2

secondary

#B9472E

accent

#2B03E3

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #51D5F2

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

Preview Lab → · Contrast checker → · Palette generator →