#51A6DD#51A6DD

#51A6DD is a light, moderate cyan. Relative luminance 0.342; OKLCH L 69.5% C 0.115 H 239.7°. Best body text is #000000 at 7.85:1 contrast (WCAG AA passes).

Color values

HEX	#51A6DD
RGB	rgb(81, 166, 221)
HSL	hsl(204, 67%, 59%)
HSV	hsv(204, 63%, 87%)
CMYK	cmyk(63.3%, 24.9%, 0%, 13.3%)
CIE-LAB	lab(65.15, -9.07, -35.46)
CIE-LCH	lch(65.15, 36.60, 255.65°)
OKLab	oklab(69.53% -0.0581 -0.0996)
OKLCH	oklch(69.53% 0.115 239.7)
XYZ	xyz(30.0757, 34.2392, 73.4164)
Luminance	0.3424 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A6DD #DD8851

analogous

#51DDCE #51A6DD #5160DD

triadic

#51A6DD #DD51A6 #A6DD51

tetradic

#51A6DD #CE51DD #DD8851 #60DD51

square

#51A6DD #CE51DD #DD8851 #60DD51

split-complementary

#51A6DD #DD5160 #DDCE51

monochromatic

#1D6796 #278AC9 #51A6DD #84C0E7 #B7DAF1

Accessibility & contrast

On white

2.68

#51A6DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.85

#51A6DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A6DD

7.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A6DD	#FFFFFF	#000000	##000000
##51A6DD	1.00	2.68	7.85	7.85
#FFFFFF	2.68	1.00	21.00	21.00
#000000	7.85	21.00	1.00	1.00
##000000	7.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8DA6E0

Deuteranopia (green-blind)

#7A98DC

Tritanopia (blue-blind)

#00B4B9

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51a6dd;
/* rgb */ color: rgb(81, 166, 221);
/* oklch */ color: oklch(69.5% 0.115 239.7);

Tailwind

colors: {
  custom: {
    50: '#8fc0e7',
    500: '#51a6dd',
    950: '#000000',
  },
}

SCSS

$custom: #51a6dd;
$custom-light: #8fc0e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51a6dd",
  "rgb": {
    "r": 81,
    "g": 166,
    "b": 221
  },
  "hsl": {
    "h": 203.571,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.69534,
    "c": 0.11536,
    "h": 239.7
  },
  "luminance": 0.34242
}

Semantic roles & 50–950 ramp

primary

#51A6DD

secondary

#E0BFAA

accent

#813EEA

background

#F9FBFE

surface

#F2F7FC

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A6DD

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

Preview Lab → · Contrast checker → · Palette generator →