#51A5CB#51A5CB

#51A5CB is a light, moderate cyan. Relative luminance 0.330; OKLCH L 68.5% C 0.099 H 230.0°. Best body text is #000000 at 7.59:1 contrast (WCAG AA passes).

Color values

HEX	#51A5CB
RGB	rgb(81, 165, 203)
HSL	hsl(199, 54%, 56%)
HSV	hsv(199, 60%, 80%)
CMYK	cmyk(60.1%, 18.7%, 0%, 20.4%)
CIE-LAB	lab(64.14, -14.22, -27.07)
CIE-LCH	lch(64.14, 30.57, 242.29°)
OKLab	oklab(68.49% -0.0633 -0.0756)
OKLCH	oklch(68.49% 0.099 230)
XYZ	xyz(27.6238, 32.9687, 61.3962)
Luminance	0.3297 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A5CB #CB7751

analogous

#51CBB4 #51A5CB #5168CB

triadic

#51A5CB #CB51A5 #A5CB51

tetradic

#51A5CB #B451CB #CB7751 #68CB51

square

#51A5CB #B451CB #CB7751 #68CB51

split-complementary

#51A5CB #CB5168 #CBB451

monochromatic

#25617C #3386AC #51A5CB #80BDD9 #AFD6E7

Accessibility & contrast

On white

2.77

#51A5CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.59

#51A5CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A5CB

7.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A5CB	#FFFFFF	#000000	##000000
##51A5CB	1.00	2.77	7.59	7.59
#FFFFFF	2.77	1.00	21.00	21.00
#000000	7.59	21.00	1.00	1.00
##000000	7.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#92A3CD

Deuteranopia (green-blind)

#8196CA

Tritanopia (blue-blind)

#00B0B1

Achromatopsia (no color)

#9B9B9B

Design tokens & code

CSS

--color: #51a5cb;
/* rgb */ color: rgb(81, 165, 203);
/* oklch */ color: oklch(68.5% 0.099 230.0);

Tailwind

colors: {
  custom: {
    50: '#8dbfdb',
    500: '#51a5cb',
    950: '#000000',
  },
}

SCSS

$custom: #51a5cb;
$custom-light: #8dbfdb;
$custom-dark: #000000;

JSON

{
  "hex": "#51a5cb",
  "rgb": {
    "r": 81,
    "g": 165,
    "b": 203
  },
  "hsl": {
    "h": 198.689,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.68487,
    "c": 0.09856,
    "h": 230
  },
  "luminance": 0.32971
}

Semantic roles & 50–950 ramp

primary

#51A5CB

secondary

#D5B2A3

accent

#784ADD

background

#F9FBFD

surface

#F1F7FA

border

#CBD0D3

text

#0D1215

muted

#7E8183

Preview Lab

Preview with #51A5CB

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

Preview Lab → · Contrast checker → · Palette generator →