#42B4D5#42B4D5

#42B4D5 is a light, moderate cyan. Relative luminance 0.386; OKLCH L 71.9% C 0.111 H 220.9°. Best body text is #000000 at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#42B4D5
RGB	rgb(66, 180, 213)
HSL	hsl(193, 64%, 55%)
HSV	hsv(193, 69%, 84%)
CMYK	cmyk(69%, 15.5%, 0%, 16.5%)
CIE-LAB	lab(68.46, -21.47, -25.98)
CIE-LCH	lch(68.46, 33.70, 230.43°)
OKLab	oklab(71.94% -0.0839 -0.0725)
OKLCH	oklch(71.94% 0.111 220.9)
XYZ	xyz(30.5733, 38.6014, 68.7774)
Luminance	0.3861 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B4D5 #D56342

analogous

#42D5AC #42B4D5 #426BD5

triadic

#42B4D5 #D542B4 #B4D542

tetradic

#42B4D5 #AC42D5 #D56342 #6BD542

square

#42B4D5 #AC42D5 #D56342 #6BD542

split-complementary

#42B4D5 #D5426B #D5AC42

monochromatic

#1C6A80 #2893B2 #42B4D5 #74C8E0 #A6DCEB

Accessibility & contrast

On white

2.41

#42B4D5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.72

#42B4D5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4D5

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B4D5	#FFFFFF	#000000	##000000
##42B4D5	1.00	2.41	8.72	8.72
#FFFFFF	2.41	1.00	21.00	21.00
#000000	8.72	21.00	1.00	1.00
##000000	8.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0AFD7

Deuteranopia (green-blind)

#8CA0D5

Tritanopia (blue-blind)

#00BFBF

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #42b4d5;
/* rgb */ color: rgb(66, 180, 213);
/* oklch */ color: oklch(71.9% 0.111 220.9);

Tailwind

colors: {
  custom: {
    50: '#88cae2',
    500: '#42b4d5',
    950: '#000000',
  },
}

SCSS

$custom: #42b4d5;
$custom-light: #88cae2;
$custom-dark: #000000;

JSON

{
  "hex": "#42b4d5",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 213
  },
  "hsl": {
    "h": 193.469,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.71942,
    "c": 0.11088,
    "h": 220.9
  },
  "luminance": 0.38605
}

Semantic roles & 50–950 ramp

primary

#42B4D5

secondary

#D8A89A

accent

#6641E7

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B4D5

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

Preview Lab → · Contrast checker → · Palette generator →