#42B4DB#42B4DB

#42B4DB is a light, moderate cyan. Relative luminance 0.389; OKLCH L 72.2% C 0.115 H 224.8°. Best body text is #000000 at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#42B4DB
RGB	rgb(66, 180, 219)
HSL	hsl(195, 68%, 56%)
HSV	hsv(195, 70%, 86%)
CMYK	cmyk(69.9%, 17.8%, 0%, 14.1%)
CIE-LAB	lab(68.69, -19.57, -28.92)
CIE-LCH	lch(68.69, 34.92, 235.92°)
OKLab	oklab(72.2% -0.0816 -0.0809)
OKLCH	oklch(72.2% 0.115 224.8)
XYZ	xyz(31.3490, 38.9117, 72.8626)
Luminance	0.3891 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B4DB #DB6942

analogous

#42DBB5 #42B4DB #4267DB

triadic

#42B4DB #DB42B4 #B4DB42

tetradic

#42B4DB #B542DB #DB6942 #67DB42

square

#42B4DB #B542DB #DB6942 #67DB42

split-complementary

#42B4DB #DB4267 #DBB542

monochromatic

#1A6C89 #2495BC #42B4DB #75C8E5 #A9DDEF

Accessibility & contrast

On white

2.39

#42B4DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.78

#42B4DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4DB

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B4DB	#FFFFFF	#000000	##000000
##42B4DB	1.00	2.39	8.78	8.78
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.78	21.00	1.00	1.00
##000000	8.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EB0DD

Deuteranopia (green-blind)

#89A1DB

Tritanopia (blue-blind)

#00C0C1

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #42b4db;
/* rgb */ color: rgb(66, 180, 219);
/* oklch */ color: oklch(72.2% 0.115 224.8);

Tailwind

colors: {
  custom: {
    50: '#89cae6',
    500: '#42b4db',
    950: '#000000',
  },
}

SCSS

$custom: #42b4db;
$custom-light: #89cae6;
$custom-dark: #000000;

JSON

{
  "hex": "#42b4db",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 219
  },
  "hsl": {
    "h": 195.294,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.72198,
    "c": 0.11493,
    "h": 224.8
  },
  "luminance": 0.38915
}

Semantic roles & 50–950 ramp

primary

#42B4DB

secondary

#DCAD9D

accent

#693DEB

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #42B4DB

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

Preview Lab → · Contrast checker → · Palette generator →