#51A3D9#51A3D9

#51A3D9 is a light, moderate cyan. Relative luminance 0.330; OKLCH L 68.7% C 0.113 H 240.1°. Best body text is #000000 at 7.59:1 contrast (WCAG AA passes).

Color values

HEX	#51A3D9
RGB	rgb(81, 163, 217)
HSL	hsl(204, 64%, 58%)
HSV	hsv(204, 63%, 85%)
CMYK	cmyk(62.7%, 24.9%, 0%, 14.9%)
CIE-LAB	lab(64.12, -8.70, -34.85)
CIE-LCH	lch(64.12, 35.92, 255.98°)
OKLab	oklab(68.66% -0.0563 -0.0979)
OKLCH	oklch(68.66% 0.113 240.1)
XYZ	xyz(29.0102, 32.9506, 70.4634)
Luminance	0.3295 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A3D9 #D98751

analogous

#51D9CB #51A3D9 #515FD9

triadic

#51A3D9 #D951A3 #A3D951

tetradic

#51A3D9 #CB51D9 #D98751 #5FD951

square

#51A3D9 #CB51D9 #D98751 #5FD951

split-complementary

#51A3D9 #D9515F #D9CB51

monochromatic

#1F6390 #2A86C2 #51A3D9 #83BEE4 #B5D8EF

Accessibility & contrast

On white

2.77

#51A3D9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.59

#51A3D9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A3D9

7.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A3D9	#FFFFFF	#000000	##000000
##51A3D9	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)

#8AA3DB

Deuteranopia (green-blind)

#7895D8

Tritanopia (blue-blind)

#00B0B5

Achromatopsia (no color)

#9B9B9B

Design tokens & code

CSS

--color: #51a3d9;
/* rgb */ color: rgb(81, 163, 217);
/* oklch */ color: oklch(68.7% 0.113 240.1);

Tailwind

colors: {
  custom: {
    50: '#8ebee5',
    500: '#51a3d9',
    950: '#000000',
  },
}

SCSS

$custom: #51a3d9;
$custom-light: #8ebee5;
$custom-dark: #000000;

JSON

{
  "hex": "#51a3d9",
  "rgb": {
    "r": 81,
    "g": 163,
    "b": 217
  },
  "hsl": {
    "h": 203.824,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.68662,
    "c": 0.11296,
    "h": 240.1
  },
  "luminance": 0.32953
}

Semantic roles & 50–950 ramp

primary

#51A3D9

secondary

#DEBDA8

accent

#8341E7

background

#F9FBFE

surface

#F2F6FC

border

#CCD0D5

text

#0D1215

muted

#7E8184

Preview Lab

Preview with #51A3D9

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

Preview Lab → · Contrast checker → · Palette generator →