#42B3D8#42B3D8

#42B3D8 is a light, moderate cyan. Relative luminance 0.384; OKLCH L 71.8% C 0.113 H 223.7°. Best body text is #000000 at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#42B3D8
RGB	rgb(66, 179, 216)
HSL	hsl(195, 66%, 55%)
HSV	hsv(195, 69%, 85%)
CMYK	cmyk(69.4%, 17.1%, 0%, 15.3%)
CIE-LAB	lab(68.28, -20.00, -27.91)
CIE-LCH	lch(68.28, 34.34, 234.36°)
OKLab	oklab(71.83% -0.0817 -0.078)
OKLCH	oklch(71.83% 0.113 223.7)
XYZ	xyz(30.7565, 38.3528, 70.7343)
Luminance	0.3836 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B3D8 #D86742

analogous

#42D8B2 #42B3D8 #4268D8

triadic

#42B3D8 #D842B3 #B3D842

tetradic

#42B3D8 #B242D8 #D86742 #68D842

square

#42B3D8 #B242D8 #D86742 #68D842

split-complementary

#42B3D8 #D84268 #D8B242

monochromatic

#1B6A84 #2693B7 #42B3D8 #75C7E2 #A7DCED

Accessibility & contrast

On white

2.42

#42B3D8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.67

#42B3D8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B3D8

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B3D8	#FFFFFF	#000000	##000000
##42B3D8	1.00	2.42	8.67	8.67
#FFFFFF	2.42	1.00	21.00	21.00
#000000	8.67	21.00	1.00	1.00
##000000	8.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EAFDA

Deuteranopia (green-blind)

#89A0D8

Tritanopia (blue-blind)

#00BEBF

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #42b3d8;
/* rgb */ color: rgb(66, 179, 216);
/* oklch */ color: oklch(71.8% 0.113 223.7);

Tailwind

colors: {
  custom: {
    50: '#89c9e4',
    500: '#42b3d8',
    950: '#000000',
  },
}

SCSS

$custom: #42b3d8;
$custom-light: #89c9e4;
$custom-dark: #000000;

JSON

{
  "hex": "#42b3d8",
  "rgb": {
    "r": 66,
    "g": 179,
    "b": 216
  },
  "hsl": {
    "h": 194.8,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.71834,
    "c": 0.11301,
    "h": 223.7
  },
  "luminance": 0.38356
}

Semantic roles & 50–950 ramp

primary

#42B3D8

secondary

#DAAB9C

accent

#693FE9

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B3D8

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

Preview Lab → · Contrast checker → · Palette generator →