#51AAF2#51AAF2

#51AAF2 is a light, vivid cyan. Relative luminance 0.369; OKLCH L 71.5% C 0.136 H 245.8°. Best body text is #000000 at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#51AAF2
RGB	rgb(81, 170, 242)
HSL	hsl(207, 86%, 63%)
HSV	hsv(207, 67%, 95%)
CMYK	cmyk(66.5%, 29.8%, 0%, 5.1%)
CIE-LAB	lab(67.21, -4.45, -43.77)
CIE-LCH	lch(67.21, 44.00, 264.20°)
OKLab	oklab(71.46% -0.0557 -0.1237)
OKLCH	oklch(71.46% 0.136 245.8)
XYZ	xyz(33.7890, 36.9060, 89.3300)
Luminance	0.3691 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51AAF2 #F29951

analogous

#51F2E9 #51AAF2 #5159F2

triadic

#51AAF2 #F251AA #AAF251

tetradic

#51AAF2 #E951F2 #F29951 #59F251

square

#51AAF2 #E951F2 #F29951 #59F251

split-complementary

#51AAF2 #F25159 #F2E951

monochromatic

#0E6DBB #188EEE #51AAF2 #8AC6F6 #C3E2FB

Accessibility & contrast

On white

2.51

#51AAF2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.38

#51AAF2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51AAF2

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51AAF2	#FFFFFF	#000000	##000000
##51AAF2	1.00	2.51	8.38	8.38
#FFFFFF	2.51	1.00	21.00	21.00
#000000	8.38	21.00	1.00	1.00
##000000	8.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8AACF5

Deuteranopia (green-blind)

#749DF1

Tritanopia (blue-blind)

#00BBC3

Achromatopsia (no color)

#A4A4A4

Design tokens & code

CSS

--color: #51aaf2;
/* rgb */ color: rgb(81, 170, 242);
/* oklch */ color: oklch(71.5% 0.136 245.8);

Tailwind

colors: {
  custom: {
    50: '#92c3f6',
    500: '#51aaf2',
    950: '#000000',
  },
}

SCSS

$custom: #51aaf2;
$custom-light: #92c3f6;
$custom-dark: #000000;

JSON

{
  "hex": "#51aaf2",
  "rgb": {
    "r": 81,
    "g": 170,
    "b": 242
  },
  "hsl": {
    "h": 206.832,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.7146,
    "c": 0.13564,
    "h": 245.8
  },
  "luminance": 0.3691
}

Semantic roles & 50–950 ramp

primary

#51AAF2

secondary

#ECCCB3

accent

#6703E3

background

#F9FBFF

surface

#F2F7FE

border

#CCD0D6

text

#0E1217

muted

#7E8185

Preview Lab

Preview with #51AAF2

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

Preview Lab → · Contrast checker → · Palette generator →