#51A9DB#51A9DB

#51A9DB is a light, moderate cyan. Relative luminance 0.352; OKLCH L 70.1% C 0.112 H 236.3°. Best body text is #000000 at 8.05:1 contrast (WCAG AA passes).

Color values

HEX	#51A9DB
RGB	rgb(81, 169, 219)
HSL	hsl(202, 66%, 59%)
HSV	hsv(202, 63%, 86%)
CMYK	cmyk(63%, 22.8%, 0%, 14.1%)
CIE-LAB	lab(65.93, -11.36, -33.15)
CIE-LCH	lch(65.93, 35.04, 251.08°)
OKLab	oklab(70.13% -0.0619 -0.0929)
OKLCH	oklch(70.13% 0.112 236.3)
XYZ	xyz(30.3626, 35.2367, 72.2053)
Luminance	0.3524 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A9DB #DB8351

analogous

#51DBC8 #51A9DB #5164DB

triadic

#51A9DB #DB51A9 #A9DB51

tetradic

#51A9DB #C851DB #DB8351 #64DB51

square

#51A9DB #C851DB #DB8351 #64DB51

split-complementary

#51A9DB #DB5164 #DBC851

monochromatic

#1E6993 #298DC6 #51A9DB #84C2E5 #B6DBF0

Accessibility & contrast

On white

2.61

#51A9DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.05

#51A9DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A9DB

8.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A9DB	#FFFFFF	#000000	##000000
##51A9DB	1.00	2.61	8.05	8.05
#FFFFFF	2.61	1.00	21.00	21.00
#000000	8.05	21.00	1.00	1.00
##000000	8.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#91A8DD

Deuteranopia (green-blind)

#7E9ADA

Tritanopia (blue-blind)

#00B6BA

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #51a9db;
/* rgb */ color: rgb(81, 169, 219);
/* oklch */ color: oklch(70.1% 0.112 236.3);

Tailwind

colors: {
  custom: {
    50: '#8fc2e6',
    500: '#51a9db',
    950: '#000000',
  },
}

SCSS

$custom: #51a9db;
$custom-light: #8fc2e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51a9db",
  "rgb": {
    "r": 81,
    "g": 169,
    "b": 219
  },
  "hsl": {
    "h": 201.739,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.70126,
    "c": 0.11169,
    "h": 236.3
  },
  "luminance": 0.3524
}

Semantic roles & 50–950 ramp

primary

#51A9DB

secondary

#DFBCA9

accent

#7D3FE9

background

#F9FBFE

surface

#F2F7FC

border

#CCD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #51A9DB

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

Preview Lab → · Contrast checker → · Palette generator →