#42B5D2#42B5D2

#42B5D2 is a light, moderate cyan. Relative luminance 0.389; OKLCH L 72.1% C 0.109 H 217.9°. Best body text is #000000 at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#42B5D2
RGB	rgb(66, 181, 210)
HSL	hsl(192, 62%, 54%)
HSV	hsv(192, 69%, 82%)
CMYK	cmyk(68.6%, 13.8%, 0%, 17.6%)
CIE-LAB	lab(68.65, -22.92, -24.05)
CIE-LCH	lch(68.65, 33.22, 226.37°)
OKLab	oklab(72.05% -0.086 -0.067)
OKLCH	oklch(72.05% 0.109 217.9)
XYZ	xyz(30.3987, 38.8557, 66.8581)
Luminance	0.3886 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B5D2 #D25F42

analogous

#42D2A7 #42B5D2 #426DD2

triadic

#42B5D2 #D242B5 #B5D242

tetradic

#42B5D2 #A742D2 #D25F42 #6DD242

square

#42B5D2 #A742D2 #D25F42 #6DD242

split-complementary

#42B5D2 #D2426D #D2A742

monochromatic

#1E697C #2993AD #42B5D2 #73C8DE #A5DCEA

Accessibility & contrast

On white

2.39

#42B5D2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.77

#42B5D2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B5D2

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B5D2	#FFFFFF	#000000	##000000
##42B5D2	1.00	2.39	8.77	8.77
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.77	21.00	1.00	1.00
##000000	8.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2B0D4

Deuteranopia (green-blind)

#8EA1D2

Tritanopia (blue-blind)

#00BFBE

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #42b5d2;
/* rgb */ color: rgb(66, 181, 210);
/* oklch */ color: oklch(72.1% 0.109 217.9);

Tailwind

colors: {
  custom: {
    50: '#88cbdf',
    500: '#42b5d2',
    950: '#000000',
  },
}

SCSS

$custom: #42b5d2;
$custom-light: #88cbdf;
$custom-dark: #000000;

JSON

{
  "hex": "#42b5d2",
  "rgb": {
    "r": 66,
    "g": 181,
    "b": 210
  },
  "hsl": {
    "h": 192.083,
    "s": 61.538,
    "l": 54.118
  },
  "oklch": {
    "l": 0.72054,
    "c": 0.10906,
    "h": 217.9
  },
  "luminance": 0.38859
}

Semantic roles & 50–950 ramp

primary

#42B5D2

secondary

#D7A699

accent

#6443E5

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B5D2

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

Preview Lab → · Contrast checker → · Palette generator →