#51A4DB#51A4DB

#51A4DB is a light, moderate cyan. Relative luminance 0.334; OKLCH L 69.0% C 0.114 H 240.3°. Best body text is #000000 at 7.68:1 contrast (WCAG AA passes).

Color values

HEX	#51A4DB
RGB	rgb(81, 164, 219)
HSL	hsl(204, 66%, 59%)
HSV	hsv(204, 63%, 86%)
CMYK	cmyk(63%, 25.1%, 0%, 14.1%)
CIE-LAB	lab(64.49, -8.61, -35.38)
CIE-LCH	lch(64.49, 36.41, 256.32°)
OKLab	oklab(68.98% -0.0567 -0.0994)
OKLCH	oklch(68.98% 0.114 240.3)
XYZ	xyz(29.4501, 33.4118, 71.9012)
Luminance	0.3342 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A4DB #DB8851

analogous

#51DBCD #51A4DB #515FDB

triadic

#51A4DB #DB51A4 #A4DB51

tetradic

#51A4DB #CD51DB #DB8851 #5FDB51

square

#51A4DB #CD51DB #DB8851 #5FDB51

split-complementary

#51A4DB #DB515F #DBCD51

monochromatic

#1E6593 #2987C6 #51A4DB #84BFE5 #B6D9F0

Accessibility & contrast

On white

2.73

#51A4DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.68

#51A4DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A4DB

7.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A4DB	#FFFFFF	#000000	##000000
##51A4DB	1.00	2.73	7.68	7.68
#FFFFFF	2.73	1.00	21.00	21.00
#000000	7.68	21.00	1.00	1.00
##000000	7.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8BA4DE

Deuteranopia (green-blind)

#7896DA

Tritanopia (blue-blind)

#00B2B7

Achromatopsia (no color)

#9C9C9C

Design tokens & code

CSS

--color: #51a4db;
/* rgb */ color: rgb(81, 164, 219);
/* oklch */ color: oklch(69.0% 0.114 240.3);

Tailwind

colors: {
  custom: {
    50: '#8ebee6',
    500: '#51a4db',
    950: '#000000',
  },
}

SCSS

$custom: #51a4db;
$custom-light: #8ebee6;
$custom-dark: #000000;

JSON

{
  "hex": "#51a4db",
  "rgb": {
    "r": 81,
    "g": 164,
    "b": 219
  },
  "hsl": {
    "h": 203.913,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.68984,
    "c": 0.11447,
    "h": 240.3
  },
  "luminance": 0.33415
}

Semantic roles & 50–950 ramp

primary

#51A4DB

secondary

#DFBEA9

accent

#833FE9

background

#F9FBFE

surface

#F2F6FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A4DB

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

Preview Lab → · Contrast checker → · Palette generator →