#42B3D5#42B3D5

#42B3D5 is a light, moderate cyan. Relative luminance 0.382; OKLCH L 71.7% C 0.111 H 221.7°. Best body text is #000000 at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#42B3D5
RGB	rgb(66, 179, 213)
HSL	hsl(194, 64%, 55%)
HSV	hsv(194, 69%, 84%)
CMYK	cmyk(69%, 16%, 0%, 16.5%)
CIE-LAB	lab(68.17, -20.95, -26.43)
CIE-LCH	lch(68.17, 33.73, 231.59°)
OKLab	oklab(71.71% -0.0829 -0.0738)
OKLCH	oklch(71.71% 0.111 221.7)
XYZ	xyz(30.3722, 38.1991, 68.7104)
Luminance	0.3820 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B3D5 #D56442

analogous

#42D5AE #42B3D5 #4269D5

triadic

#42B3D5 #D542B3 #B3D542

tetradic

#42B3D5 #AE42D5 #D56442 #69D542

square

#42B3D5 #AE42D5 #D56442 #69D542

split-complementary

#42B3D5 #D54269 #D5AE42

monochromatic

#1C6980 #2892B2 #42B3D5 #74C7E0 #A6DBEB

Accessibility & contrast

On white

2.43

#42B3D5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.64

#42B3D5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B3D5

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B3D5	#FFFFFF	#000000	##000000
##42B3D5	1.00	2.43	8.64	8.64
#FFFFFF	2.43	1.00	21.00	21.00
#000000	8.64	21.00	1.00	1.00
##000000	8.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FAFD7

Deuteranopia (green-blind)

#8BA0D5

Tritanopia (blue-blind)

#00BEBE

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #42b3d5;
/* rgb */ color: rgb(66, 179, 213);
/* oklch */ color: oklch(71.7% 0.111 221.7);

Tailwind

colors: {
  custom: {
    50: '#88cae2',
    500: '#42b3d5',
    950: '#000000',
  },
}

SCSS

$custom: #42b3d5;
$custom-light: #88cae2;
$custom-dark: #000000;

JSON

{
  "hex": "#42b3d5",
  "rgb": {
    "r": 66,
    "g": 179,
    "b": 213
  },
  "hsl": {
    "h": 193.878,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.71706,
    "c": 0.11098,
    "h": 221.7
  },
  "luminance": 0.38203
}

Semantic roles & 50–950 ramp

primary

#42B3D5

secondary

#D8A99A

accent

#6741E7

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B3D5

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

Preview Lab → · Contrast checker → · Palette generator →