#51A8CB#51A8CB

#51A8CB is a light, moderate cyan. Relative luminance 0.341; OKLCH L 69.2% C 0.098 H 227.1°. Best body text is #000000 at 7.81:1 contrast (WCAG AA passes).

Color values

HEX	#51A8CB
RGB	rgb(81, 168, 203)
HSL	hsl(197, 54%, 56%)
HSV	hsv(197, 60%, 80%)
CMYK	cmyk(60.1%, 17.2%, 0%, 20.4%)
CIE-LAB	lab(65.01, -15.82, -25.72)
CIE-LCH	lch(65.01, 30.20, 238.39°)
OKLab	oklab(69.19% -0.0665 -0.0717)
OKLCH	oklch(69.19% 0.098 227.1)
XYZ	xyz(28.1713, 34.0636, 61.5786)
Luminance	0.3407 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A8CB #CB7451

analogous

#51CBB1 #51A8CB #516BCB

triadic

#51A8CB #CB51A8 #A8CB51

tetradic

#51A8CB #B151CB #CB7451 #6BCB51

square

#51A8CB #B151CB #CB7451 #6BCB51

split-complementary

#51A8CB #CB516B #CBB151

monochromatic

#25637C #3389AC #51A8CB #80C0D9 #AFD7E7

Accessibility & contrast

On white

2.69

#51A8CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.81

#51A8CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A8CB

7.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A8CB	#FFFFFF	#000000	##000000
##51A8CB	1.00	2.69	7.81	7.81
#FFFFFF	2.69	1.00	21.00	21.00
#000000	7.81	21.00	1.00	1.00
##000000	7.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95A5CD

Deuteranopia (green-blind)

#8498CB

Tritanopia (blue-blind)

#00B2B3

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51a8cb;
/* rgb */ color: rgb(81, 168, 203);
/* oklch */ color: oklch(69.2% 0.098 227.1);

Tailwind

colors: {
  custom: {
    50: '#8dc2db',
    500: '#51a8cb',
    950: '#000000',
  },
}

SCSS

$custom: #51a8cb;
$custom-light: #8dc2db;
$custom-dark: #000000;

JSON

{
  "hex": "#51a8cb",
  "rgb": {
    "r": 81,
    "g": 168,
    "b": 203
  },
  "hsl": {
    "h": 197.213,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.69186,
    "c": 0.0978,
    "h": 227.1
  },
  "luminance": 0.34066
}

Semantic roles & 50–950 ramp

primary

#51A8CB

secondary

#D5B1A3

accent

#754ADD

background

#F9FBFD

surface

#F1F7FA

border

#CBD0D3

text

#0D1215

muted

#7E8183

Preview Lab

Preview with #51A8CB

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

Preview Lab → · Contrast checker → · Palette generator →