#42B4E2#42B4E2

#42B4E2 is a light, vivid cyan. Relative luminance 0.393; OKLCH L 72.5% C 0.120 H 228.9°. Best body text is #000000 at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#42B4E2
RGB	rgb(66, 180, 226)
HSL	hsl(197, 73%, 57%)
HSV	hsv(197, 71%, 89%)
CMYK	cmyk(70.8%, 20.4%, 0%, 11.4%)
CIE-LAB	lab(68.96, -17.32, -32.33)
CIE-LCH	lch(68.96, 36.68, 241.82°)
OKLab	oklab(72.51% -0.0791 -0.0907)
OKLCH	oklch(72.51% 0.12 228.9)
XYZ	xyz(32.2900, 39.2881, 77.8183)
Luminance	0.3929 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B4E2 #E27042

analogous

#42E2C0 #42B4E2 #4264E2

triadic

#42B4E2 #E242B4 #B4E242

tetradic

#42B4E2 #C042E2 #E27042 #64E242

square

#42B4E2 #C042E2 #E27042 #64E242

split-complementary

#42B4E2 #E24264 #E2C042

monochromatic

#176F93 #1F97C8 #42B4E2 #77C9EA #ACDEF2

Accessibility & contrast

On white

2.37

#42B4E2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.86

#42B4E2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4E2

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B4E2	#FFFFFF	#000000	##000000
##42B4E2	1.00	2.37	8.86	8.86
#FFFFFF	2.37	1.00	21.00	21.00
#000000	8.86	21.00	1.00	1.00
##000000	8.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB1E4

Deuteranopia (green-blind)

#86A1E1

Tritanopia (blue-blind)

#00C1C3

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #42b4e2;
/* rgb */ color: rgb(66, 180, 226);
/* oklch */ color: oklch(72.5% 0.120 228.9);

Tailwind

colors: {
  custom: {
    50: '#8acaeb',
    500: '#42b4e2',
    950: '#000000',
  },
}

SCSS

$custom: #42b4e2;
$custom-light: #8acaeb;
$custom-dark: #000000;

JSON

{
  "hex": "#42b4e2",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 226
  },
  "hsl": {
    "h": 197.25,
    "s": 73.394,
    "l": 57.255
  },
  "oklch": {
    "l": 0.72505,
    "c": 0.12033,
    "h": 228.9
  },
  "luminance": 0.39292
}

Semantic roles & 50–950 ramp

primary

#42B4E2

secondary

#E0B29F

accent

#6D38F0

background

#F9FCFE

surface

#F1F8FD

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #42B4E2

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

Preview Lab → · Contrast checker → · Palette generator →