#42B8D2#42B8D2

#42B8D2 is a light, moderate cyan. Relative luminance 0.401; OKLCH L 72.8% C 0.109 H 215.4°. Best body text is #000000 at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#42B8D2
RGB	rgb(66, 184, 210)
HSL	hsl(191, 62%, 54%)
HSV	hsv(191, 69%, 82%)
CMYK	cmyk(68.6%, 12.4%, 0%, 17.6%)
CIE-LAB	lab(69.53, -24.45, -22.70)
CIE-LCH	lch(69.53, 33.36, 222.87°)
OKLab	oklab(72.77% -0.089 -0.0632)
OKLCH	oklch(72.77% 0.109 215.4)
XYZ	xyz(31.0152, 40.0889, 67.0636)
Luminance	0.4009 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B8D2 #D25C42

analogous

#42D2A4 #42B8D2 #4270D2

triadic

#42B8D2 #D242B8 #B8D242

tetradic

#42B8D2 #A442D2 #D25C42 #70D242

square

#42B8D2 #A442D2 #D25C42 #70D242

split-complementary

#42B8D2 #D24270 #D2A442

monochromatic

#1E6B7C #2996AD #42B8D2 #73CBDE #A5DDEA

Accessibility & contrast

On white

2.33

#42B8D2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.02

#42B8D2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8D2

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B8D2	#FFFFFF	#000000	##000000
##42B8D2	1.00	2.33	9.02	9.02
#FFFFFF	2.33	1.00	21.00	21.00
#000000	9.02	21.00	1.00	1.00
##000000	9.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A6B2D3

Deuteranopia (green-blind)

#92A3D2

Tritanopia (blue-blind)

#00C2C0

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #42b8d2;
/* rgb */ color: rgb(66, 184, 210);
/* oklch */ color: oklch(72.8% 0.109 215.4);

Tailwind

colors: {
  custom: {
    50: '#88cddf',
    500: '#42b8d2',
    950: '#000000',
  },
}

SCSS

$custom: #42b8d2;
$custom-light: #88cddf;
$custom-dark: #000000;

JSON

{
  "hex": "#42b8d2",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 210
  },
  "hsl": {
    "h": 190.833,
    "s": 61.538,
    "l": 54.118
  },
  "oklch": {
    "l": 0.72767,
    "c": 0.10918,
    "h": 215.4
  },
  "luminance": 0.40092
}

Semantic roles & 50–950 ramp

primary

#42B8D2

secondary

#D7A499

accent

#6043E5

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B8D2

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

Preview Lab → · Contrast checker → · Palette generator →