#51A5CC#51A5CC

#51A5CC is a light, moderate cyan. Relative luminance 0.330; OKLCH L 68.5% C 0.099 H 230.7°. Best body text is #000000 at 7.60:1 contrast (WCAG AA passes).

Color values

HEX	#51A5CC
RGB	rgb(81, 165, 204)
HSL	hsl(199, 55%, 56%)
HSV	hsv(199, 60%, 80%)
CMYK	cmyk(60.3%, 19.1%, 0%, 20%)
CIE-LAB	lab(64.17, -13.91, -27.56)
CIE-LCH	lch(64.17, 30.87, 243.23°)
OKLab	oklab(68.53% -0.0629 -0.077)
OKLCH	oklch(68.53% 0.099 230.7)
XYZ	xyz(27.7433, 33.0165, 62.0258)
Luminance	0.3302 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A5CC #CC7851

analogous

#51CCB5 #51A5CC #5167CC

triadic

#51A5CC #CC51A5 #A5CC51

tetradic

#51A5CC #B551CC #CC7851 #67CC51

square

#51A5CC #B551CC #CC7851 #67CC51

split-complementary

#51A5CC #CC5167 #CCB551

monochromatic

#25627E #3386AD #51A5CC #80BDDA #B0D6E8

Accessibility & contrast

On white

2.76

#51A5CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.60

#51A5CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A5CC

7.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A5CC	#FFFFFF	#000000	##000000
##51A5CC	1.00	2.76	7.60	7.60
#FFFFFF	2.76	1.00	21.00	21.00
#000000	7.60	21.00	1.00	1.00
##000000	7.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#91A3CE

Deuteranopia (green-blind)

#8096CB

Tritanopia (blue-blind)

#00B0B2

Achromatopsia (no color)

#9C9C9C

Design tokens & code

CSS

--color: #51a5cc;
/* rgb */ color: rgb(81, 165, 204);
/* oklch */ color: oklch(68.5% 0.099 230.7);

Tailwind

colors: {
  custom: {
    50: '#8dbfdb',
    500: '#51a5cc',
    950: '#000000',
  },
}

SCSS

$custom: #51a5cc;
$custom-light: #8dbfdb;
$custom-dark: #000000;

JSON

{
  "hex": "#51a5cc",
  "rgb": {
    "r": 81,
    "g": 165,
    "b": 204
  },
  "hsl": {
    "h": 199.024,
    "s": 54.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.6853,
    "c": 0.09941,
    "h": 230.7
  },
  "luminance": 0.33019
}

Semantic roles & 50–950 ramp

primary

#51A5CC

secondary

#D6B3A3

accent

#794ADE

background

#F9FBFD

surface

#F1F7FB

border

#CBD0D4

text

#0D1215

muted

#7E8183

Preview Lab

Preview with #51A5CC

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

Preview Lab → · Contrast checker → · Palette generator →