#42A3D5#42A3D5

#42A3D5 is a light, moderate cyan. Relative luminance 0.322; OKLCH L 68.0% C 0.116 H 234.7°. Best body text is #000000 at 7.43:1 contrast (WCAG AA passes).

Color values

HEX	#42A3D5
RGB	rgb(66, 163, 213)
HSL	hsl(200, 64%, 55%)
HSV	hsv(200, 69%, 84%)
CMYK	cmyk(69%, 23.5%, 0%, 16.5%)
CIE-LAB	lab(63.47, -12.45, -33.69)
CIE-LCH	lch(63.47, 35.91, 249.72°)
OKLab	oklab(67.95% -0.0669 -0.0947)
OKLCH	oklch(67.95% 0.116 234.7)
XYZ	xyz(27.3495, 32.1537, 67.7028)
Luminance	0.3216 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A3D5 #D57442

analogous

#42D5BD #42A3D5 #425AD5

triadic

#42A3D5 #D542A3 #A3D542

tetradic

#42A3D5 #BD42D5 #D57442 #5AD542

square

#42A3D5 #BD42D5 #D57442 #5AD542

split-complementary

#42A3D5 #D5425A #D5BD42

monochromatic

#1C5E80 #2883B2 #42A3D5 #74BBE0 #A6D4EB

Accessibility & contrast

On white

2.83

#42A3D5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.43

#42A3D5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A3D5

7.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A3D5	#FFFFFF	#000000	##000000
##42A3D5	1.00	2.83	7.43	7.43
#FFFFFF	2.83	1.00	21.00	21.00
#000000	7.43	21.00	1.00	1.00
##000000	7.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8BA2D7

Deuteranopia (green-blind)

#7793D4

Tritanopia (blue-blind)

#00B0B4

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #42a3d5;
/* rgb */ color: rgb(66, 163, 213);
/* oklch */ color: oklch(68.0% 0.116 234.7);

Tailwind

colors: {
  custom: {
    50: '#87bee2',
    500: '#42a3d5',
    950: '#000000',
  },
}

SCSS

$custom: #42a3d5;
$custom-light: #87bee2;
$custom-dark: #000000;

JSON

{
  "hex": "#42a3d5",
  "rgb": {
    "r": 66,
    "g": 163,
    "b": 213
  },
  "hsl": {
    "h": 200.408,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.67954,
    "c": 0.11596,
    "h": 234.7
  },
  "luminance": 0.32157
}

Semantic roles & 50–950 ramp

primary

#42A3D5

secondary

#D8AF9A

accent

#7941E7

background

#F8FBFD

surface

#F0F6FB

border

#CBD0D4

text

#0D1215

muted

#7D8183

Preview Lab

Preview with #42A3D5

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

Preview Lab → · Contrast checker → · Palette generator →