#51B4F2#51B4F2

#51B4F2 is a light, vivid cyan. Relative luminance 0.408; OKLCH L 73.7% C 0.129 H 239.4°. Best body text is #000000 at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#51B4F2
RGB	rgb(81, 180, 242)
HSL	hsl(203, 86%, 63%)
HSV	hsv(203, 67%, 95%)
CMYK	cmyk(66.5%, 25.6%, 0%, 5.1%)
CIE-LAB	lab(70.03, -9.96, -39.35)
CIE-LCH	lch(70.03, 40.59, 255.79°)
OKLab	oklab(73.7% -0.0655 -0.1108)
OKLCH	oklch(73.7% 0.129 239.4)
XYZ	xyz(35.7354, 40.7989, 89.9788)
Luminance	0.4080 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B4F2 #F28F51

analogous

#51F2E0 #51B4F2 #5163F2

triadic

#51B4F2 #F251B4 #B4F251

tetradic

#51B4F2 #E051F2 #F28F51 #63F251

square

#51B4F2 #E051F2 #F28F51 #63F251

split-complementary

#51B4F2 #F25163 #F2E051

monochromatic

#0E78BB #189BEE #51B4F2 #8ACDF6 #C3E5FB

Accessibility & contrast

On white

2.29

#51B4F2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.16

#51B4F2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B4F2

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B4F2	#FFFFFF	#000000	##000000
##51B4F2	1.00	2.29	9.16	9.16
#FFFFFF	2.29	1.00	21.00	21.00
#000000	9.16	21.00	1.00	1.00
##000000	9.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#97B4F5

Deuteranopia (green-blind)

#81A4F1

Tritanopia (blue-blind)

#00C4C9

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #51b4f2;
/* rgb */ color: rgb(81, 180, 242);
/* oklch */ color: oklch(73.7% 0.129 239.4);

Tailwind

colors: {
  custom: {
    50: '#92caf6',
    500: '#51b4f2',
    950: '#000000',
  },
}

SCSS

$custom: #51b4f2;
$custom-light: #92caf6;
$custom-dark: #000000;

JSON

{
  "hex": "#51b4f2",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 242
  },
  "hsl": {
    "h": 203.106,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.73696,
    "c": 0.12868,
    "h": 239.4
  },
  "luminance": 0.40803
}

Semantic roles & 50–950 ramp

primary

#51B4F2

secondary

#ECC9B3

accent

#5903E3

background

#F9FCFF

surface

#F2F8FE

border

#CCD1D6

text

#0E1317

muted

#7E8285

Preview Lab

Preview with #51B4F2

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

Preview Lab → · Contrast checker → · Palette generator →