#51A4DA#51A4DA

#51A4DA is a light, moderate cyan. Relative luminance 0.334; OKLCH L 68.9% C 0.113 H 239.8°. Best body text is #000000 at 7.67:1 contrast (WCAG AA passes).

Color values

HEX	#51A4DA
RGB	rgb(81, 164, 218)
HSL	hsl(204, 65%, 59%)
HSV	hsv(204, 63%, 85%)
CMYK	cmyk(62.8%, 24.8%, 0%, 14.5%)
CIE-LAB	lab(64.45, -8.93, -34.89)
CIE-LCH	lch(64.45, 36.02, 255.64°)
OKLab	oklab(68.94% -0.057 -0.098)
OKLCH	oklch(68.94% 0.113 239.8)
XYZ	xyz(29.3189, 33.3593, 71.2099)
Luminance	0.3336 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A4DA #DA8751

analogous

#51DACC #51A4DA #515FDA

triadic

#51A4DA #DA51A4 #A4DA51

tetradic

#51A4DA #CC51DA #DA8751 #5FDA51

square

#51A4DA #CC51DA #DA8751 #5FDA51

split-complementary

#51A4DA #DA515F #DACC51

monochromatic

#1F6492 #2A87C4 #51A4DA #83BEE5 #B6D9EF

Accessibility & contrast

On white

2.74

#51A4DA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.67

#51A4DA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A4DA

7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A4DA	#FFFFFF	#000000	##000000
##51A4DA	1.00	2.74	7.67	7.67
#FFFFFF	2.74	1.00	21.00	21.00
#000000	7.67	21.00	1.00	1.00
##000000	7.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8BA4DD

Deuteranopia (green-blind)

#7996D9

Tritanopia (blue-blind)

#00B2B6

Achromatopsia (no color)

#9C9C9C

Design tokens & code

CSS

--color: #51a4da;
/* rgb */ color: rgb(81, 164, 218);
/* oklch */ color: oklch(68.9% 0.113 239.8);

Tailwind

colors: {
  custom: {
    50: '#8ebee5',
    500: '#51a4da',
    950: '#000000',
  },
}

SCSS

$custom: #51a4da;
$custom-light: #8ebee5;
$custom-dark: #000000;

JSON

{
  "hex": "#51a4da",
  "rgb": {
    "r": 81,
    "g": 164,
    "b": 218
  },
  "hsl": {
    "h": 203.65,
    "s": 64.929,
    "l": 58.627
  },
  "oklch": {
    "l": 0.68937,
    "c": 0.11341,
    "h": 239.8
  },
  "luminance": 0.33362
}

Semantic roles & 50–950 ramp

primary

#51A4DA

secondary

#DEBEA8

accent

#8240E8

background

#F9FBFE

surface

#F2F6FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A4DA

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

Preview Lab → · Contrast checker → · Palette generator →