#51A3DD#51A3DD

#51A3DD is a light, moderate cyan. Relative luminance 0.332; OKLCH L 68.9% C 0.117 H 242.0°. Best body text is #000000 at 7.63:1 contrast (WCAG AA passes).

Color values

HEX	#51A3DD
RGB	rgb(81, 163, 221)
HSL	hsl(205, 67%, 59%)
HSV	hsv(205, 63%, 87%)
CMYK	cmyk(63.3%, 26.2%, 0%, 13.3%)
CIE-LAB	lab(64.29, -7.41, -36.80)
CIE-LCH	lch(64.29, 37.54, 258.61°)
OKLab	oklab(68.85% -0.055 -0.1035)
OKLCH	oklch(68.85% 0.117 242)
XYZ	xyz(29.5367, 33.1612, 73.2367)
Luminance	0.3316 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A3DD #DD8B51

analogous

#51DDD1 #51A3DD #515DDD

triadic

#51A3DD #DD51A3 #A3DD51

tetradic

#51A3DD #D151DD #DD8B51 #5DDD51

square

#51A3DD #D151DD #DD8B51 #5DDD51

split-complementary

#51A3DD #DD515D #DDD151

monochromatic

#1D6496 #2786C9 #51A3DD #84BEE7 #B7D9F1

Accessibility & contrast

On white

2.75

#51A3DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.63

#51A3DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A3DD

7.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A3DD	#FFFFFF	#000000	##000000
##51A3DD	1.00	2.75	7.63	7.63
#FFFFFF	2.75	1.00	21.00	21.00
#000000	7.63	21.00	1.00	1.00
##000000	7.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#89A4E0

Deuteranopia (green-blind)

#7696DC

Tritanopia (blue-blind)

#00B1B7

Achromatopsia (no color)

#9C9C9C

Design tokens & code

CSS

--color: #51a3dd;
/* rgb */ color: rgb(81, 163, 221);
/* oklch */ color: oklch(68.9% 0.117 242.0);

Tailwind

colors: {
  custom: {
    50: '#8fbee7',
    500: '#51a3dd',
    950: '#000000',
  },
}

SCSS

$custom: #51a3dd;
$custom-light: #8fbee7;
$custom-dark: #000000;

JSON

{
  "hex": "#51a3dd",
  "rgb": {
    "r": 81,
    "g": 163,
    "b": 221
  },
  "hsl": {
    "h": 204.857,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.68853,
    "c": 0.11726,
    "h": 242
  },
  "luminance": 0.33164
}

Semantic roles & 50–950 ramp

primary

#51A3DD

secondary

#E0C0AA

accent

#853EEA

background

#F9FBFE

surface

#F2F6FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A3DD

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

Preview Lab → · Contrast checker → · Palette generator →