#42B2E1#42B2E1

#42B2E1 is a light, vivid cyan. Relative luminance 0.384; OKLCH L 72.0% C 0.120 H 229.9°. Best body text is #000000 at 8.69:1 contrast (WCAG AA passes).

Color values

HEX	#42B2E1
RGB	rgb(66, 178, 225)
HSL	hsl(198, 73%, 57%)
HSV	hsv(198, 71%, 88%)
CMYK	cmyk(70.7%, 20.9%, 0%, 11.8%)
CIE-LAB	lab(68.34, -16.59, -32.75)
CIE-LCH	lch(68.34, 36.71, 243.14°)
OKLab	oklab(72% -0.0775 -0.0919)
OKLCH	oklch(72% 0.12 229.9)
XYZ	xyz(31.7523, 38.4317, 76.9642)
Luminance	0.3844 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B2E1 #E17142

analogous

#42E1C1 #42B2E1 #4263E1

triadic

#42B2E1 #E142B2 #B2E142

tetradic

#42B2E1 #C142E1 #E17142 #63E142

square

#42B2E1 #C142E1 #E17142 #63E142

split-complementary

#42B2E1 #E14263 #E1C142

monochromatic

#176D92 #1F95C6 #42B2E1 #77C8E9 #ACDDF2

Accessibility & contrast

On white

2.42

#42B2E1 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.69

#42B2E1 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B2E1

8.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B2E1	#FFFFFF	#000000	##000000
##42B2E1	1.00	2.42	8.69	8.69
#FFFFFF	2.42	1.00	21.00	21.00
#000000	8.69	21.00	1.00	1.00
##000000	8.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9AAFE3

Deuteranopia (green-blind)

#84A0E0

Tritanopia (blue-blind)

#00BFC2

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #42b2e1;
/* rgb */ color: rgb(66, 178, 225);
/* oklch */ color: oklch(72.0% 0.120 229.9);

Tailwind

colors: {
  custom: {
    50: '#8ac9ea',
    500: '#42b2e1',
    950: '#000000',
  },
}

SCSS

$custom: #42b2e1;
$custom-light: #8ac9ea;
$custom-dark: #000000;

JSON

{
  "hex": "#42b2e1",
  "rgb": {
    "r": 66,
    "g": 178,
    "b": 225
  },
  "hsl": {
    "h": 197.736,
    "s": 72.603,
    "l": 57.059
  },
  "oklch": {
    "l": 0.71996,
    "c": 0.12021,
    "h": 229.9
  },
  "luminance": 0.38435
}

Semantic roles & 50–950 ramp

primary

#42B2E1

secondary

#E0B29F

accent

#6F38EF

background

#F9FCFE

surface

#F1F8FD

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #42B2E1

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

Preview Lab → · Contrast checker → · Palette generator →