#42A8D9#42A8D9

#42A8D9 is a light, moderate cyan. Relative luminance 0.342; OKLCH L 69.3% C 0.117 H 233.0°. Best body text is #000000 at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#42A8D9
RGB	rgb(66, 168, 217)
HSL	hsl(199, 67%, 55%)
HSV	hsv(199, 70%, 85%)
CMYK	cmyk(69.6%, 22.6%, 0%, 14.9%)
CIE-LAB	lab(65.10, -13.85, -33.37)
CIE-LCH	lch(65.10, 36.13, 247.47°)
OKLab	oklab(69.31% -0.0705 -0.0937)
OKLCH	oklch(69.31% 0.117 233)
XYZ	xyz(28.7688, 34.1701, 70.7115)
Luminance	0.3417 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A8D9 #D97342

analogous

#42D9BE #42A8D9 #425CD9

triadic

#42A8D9 #D942A8 #A8D942

tetradic

#42A8D9 #BE42D9 #D97342 #5CD942

square

#42A8D9 #BE42D9 #D97342 #5CD942

split-complementary

#42A8D9 #D9425C #D9BE42

monochromatic

#1B6386 #2589B9 #42A8D9 #75BFE3 #A8D7ED

Accessibility & contrast

On white

2.68

#42A8D9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.83

#42A8D9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A8D9

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A8D9	#FFFFFF	#000000	##000000
##42A8D9	1.00	2.68	7.83	7.83
#FFFFFF	2.68	1.00	21.00	21.00
#000000	7.83	21.00	1.00	1.00
##000000	7.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#90A6DB

Deuteranopia (green-blind)

#7B97D8

Tritanopia (blue-blind)

#00B5B8

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #42a8d9;
/* rgb */ color: rgb(66, 168, 217);
/* oklch */ color: oklch(69.3% 0.117 233.0);

Tailwind

colors: {
  custom: {
    50: '#88c1e5',
    500: '#42a8d9',
    950: '#000000',
  },
}

SCSS

$custom: #42a8d9;
$custom-light: #88c1e5;
$custom-dark: #000000;

JSON

{
  "hex": "#42a8d9",
  "rgb": {
    "r": 66,
    "g": 168,
    "b": 217
  },
  "hsl": {
    "h": 199.47,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.69305,
    "c": 0.11731,
    "h": 233
  },
  "luminance": 0.34173
}

Semantic roles & 50–950 ramp

primary

#42A8D9

secondary

#DBB09C

accent

#763EE9

background

#F9FBFE

surface

#F1F7FC

border

#CBD0D5

text

#0D1215

muted

#7E8184

Preview Lab

Preview with #42A8D9

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

Preview Lab → · Contrast checker → · Palette generator →