#51A4DC#51A4DC

#51A4DC is a light, moderate cyan. Relative luminance 0.335; OKLCH L 69.0% C 0.116 H 240.8°. Best body text is #000000 at 7.69:1 contrast (WCAG AA passes).

Color values

HEX	#51A4DC
RGB	rgb(81, 164, 220)
HSL	hsl(204, 67%, 59%)
HSV	hsv(204, 63%, 86%)
CMYK	cmyk(63.2%, 25.5%, 0%, 13.7%)
CIE-LAB	lab(64.54, -8.29, -35.87)
CIE-LCH	lch(64.54, 36.81, 256.99°)
OKLab	oklab(69.03% -0.0564 -0.1008)
OKLCH	oklch(69.03% 0.116 240.8)
XYZ	xyz(29.5822, 33.4646, 72.5966)
Luminance	0.3347 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A4DC #DC8951

analogous

#51DCCF #51A4DC #515FDC

triadic

#51A4DC #DC51A4 #A4DC51

tetradic

#51A4DC #CF51DC #DC8951 #5FDC51

square

#51A4DC #CF51DC #DC8951 #5FDC51

split-complementary

#51A4DC #DC515F #DCCF51

monochromatic

#1E6595 #2887C8 #51A4DC #84BFE6 #B7D9F0

Accessibility & contrast

On white

2.73

#51A4DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.69

#51A4DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A4DC

7.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A4DC	#FFFFFF	#000000	##000000
##51A4DC	1.00	2.73	7.69	7.69
#FFFFFF	2.73	1.00	21.00	21.00
#000000	7.69	21.00	1.00	1.00
##000000	7.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8BA4DF

Deuteranopia (green-blind)

#7896DB

Tritanopia (blue-blind)

#00B2B7

Achromatopsia (no color)

#9C9C9C

Design tokens & code

CSS

--color: #51a4dc;
/* rgb */ color: rgb(81, 164, 220);
/* oklch */ color: oklch(69.0% 0.116 240.8);

Tailwind

colors: {
  custom: {
    50: '#8fbee7',
    500: '#51a4dc',
    950: '#000000',
  },
}

SCSS

$custom: #51a4dc;
$custom-light: #8fbee7;
$custom-dark: #000000;

JSON

{
  "hex": "#51a4dc",
  "rgb": {
    "r": 81,
    "g": 164,
    "b": 220
  },
  "hsl": {
    "h": 204.173,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.69032,
    "c": 0.11553,
    "h": 240.8
  },
  "luminance": 0.33468
}

Semantic roles & 50–950 ramp

primary

#51A4DC

secondary

#E0BFA9

accent

#833EE9

background

#F9FBFE

surface

#F2F6FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A4DC

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

Preview Lab → · Contrast checker → · Palette generator →