#42B8D5#42B8D5

#42B8D5 is a light, moderate cyan. Relative luminance 0.402; OKLCH L 72.9% C 0.111 H 217.5°. Best body text is #000000 at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#42B8D5
RGB	rgb(66, 184, 213)
HSL	hsl(192, 64%, 55%)
HSV	hsv(192, 69%, 84%)
CMYK	cmyk(69%, 13.6%, 0%, 16.5%)
CIE-LAB	lab(69.64, -23.52, -24.17)
CIE-LCH	lch(69.64, 33.73, 225.79°)
OKLab	oklab(72.89% -0.0879 -0.0674)
OKLCH	oklch(72.89% 0.111 217.5)
XYZ	xyz(31.3925, 40.2398, 69.0505)
Luminance	0.4024 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B8D5 #D55F42

analogous

#42D5A9 #42B8D5 #426ED5

triadic

#42B8D5 #D542B8 #B8D542

tetradic

#42B8D5 #A942D5 #D55F42 #6ED542

square

#42B8D5 #A942D5 #D55F42 #6ED542

split-complementary

#42B8D5 #D5426E #D5A942

monochromatic

#1C6C80 #2897B2 #42B8D5 #74CBE0 #A6DEEB

Accessibility & contrast

On white

2.32

#42B8D5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.05

#42B8D5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8D5

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B8D5	#FFFFFF	#000000	##000000
##42B8D5	1.00	2.32	9.05	9.05
#FFFFFF	2.32	1.00	21.00	21.00
#000000	9.05	21.00	1.00	1.00
##000000	9.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B3D7

Deuteranopia (green-blind)

#90A4D5

Tritanopia (blue-blind)

#00C2C1

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #42b8d5;
/* rgb */ color: rgb(66, 184, 213);
/* oklch */ color: oklch(72.9% 0.111 217.5);

Tailwind

colors: {
  custom: {
    50: '#89cde2',
    500: '#42b8d5',
    950: '#000000',
  },
}

SCSS

$custom: #42b8d5;
$custom-light: #89cde2;
$custom-dark: #000000;

JSON

{
  "hex": "#42b8d5",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 213
  },
  "hsl": {
    "h": 191.837,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.72888,
    "c": 0.11073,
    "h": 217.5
  },
  "luminance": 0.40243
}

Semantic roles & 50–950 ramp

primary

#42B8D5

secondary

#D8A79A

accent

#6241E7

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B8D5

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

Preview Lab → · Contrast checker → · Palette generator →