#42B5DA#42B5DA

#42B5DA is a light, moderate cyan. Relative luminance 0.393; OKLCH L 72.4% C 0.114 H 223.3°. Best body text is #000000 at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#42B5DA
RGB	rgb(66, 181, 218)
HSL	hsl(195, 67%, 56%)
HSV	hsv(195, 70%, 85%)
CMYK	cmyk(69.7%, 17%, 0%, 14.5%)
CIE-LAB	lab(68.94, -20.41, -27.98)
CIE-LCH	lch(68.94, 34.63, 233.90°)
OKLab	oklab(72.39% -0.083 -0.0782)
OKLCH	oklch(72.39% 0.114 223.3)
XYZ	xyz(31.4204, 39.2644, 72.2389)
Luminance	0.3927 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B5DA #DA6742

analogous

#42DAB3 #42B5DA #4269DA

triadic

#42B5DA #DA42B5 #B5DA42

tetradic

#42B5DA #B342DA #DA6742 #69DA42

square

#42B5DA #B342DA #DA6742 #69DA42

split-complementary

#42B5DA #DA4269 #DAB342

monochromatic

#1A6D87 #2496BA #42B5DA #75C9E4 #A8DDEE

Accessibility & contrast

On white

2.37

#42B5DA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.85

#42B5DA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B5DA

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B5DA	#FFFFFF	#000000	##000000
##42B5DA	1.00	2.37	8.85	8.85
#FFFFFF	2.37	1.00	21.00	21.00
#000000	8.85	21.00	1.00	1.00
##000000	8.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0B1DC

Deuteranopia (green-blind)

#8BA2DA

Tritanopia (blue-blind)

#00C0C1

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #42b5da;
/* rgb */ color: rgb(66, 181, 218);
/* oklch */ color: oklch(72.4% 0.114 223.3);

Tailwind

colors: {
  custom: {
    50: '#89cbe5',
    500: '#42b5da',
    950: '#000000',
  },
}

SCSS

$custom: #42b5da;
$custom-light: #89cbe5;
$custom-dark: #000000;

JSON

{
  "hex": "#42b5da",
  "rgb": {
    "r": 66,
    "g": 181,
    "b": 218
  },
  "hsl": {
    "h": 194.605,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.7239,
    "c": 0.11404,
    "h": 223.3
  },
  "luminance": 0.39268
}

Semantic roles & 50–950 ramp

primary

#42B5DA

secondary

#DBAC9C

accent

#683EEA

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1315

muted

#7E8284

Preview Lab

Preview with #42B5DA

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

Preview Lab → · Contrast checker → · Palette generator →