#42A9DF#42A9DF

#42A9DF is a light, vivid cyan. Relative luminance 0.349; OKLCH L 69.8% C 0.122 H 235.4°. Best body text is #000000 at 7.97:1 contrast (WCAG AA passes).

Color values

HEX	#42A9DF
RGB	rgb(66, 169, 223)
HSL	hsl(201, 71%, 57%)
HSV	hsv(201, 70%, 87%)
CMYK	cmyk(70.4%, 24.2%, 0%, 12.5%)
CIE-LAB	lab(65.64, -12.41, -35.84)
CIE-LCH	lch(65.64, 37.93, 250.90°)
OKLab	oklab(69.82% -0.0694 -0.1009)
OKLCH	oklch(69.82% 0.122 235.4)
XYZ	xyz(29.7488, 34.8586, 74.9583)
Luminance	0.3486 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A9DF #DF7842

analogous

#42DFC7 #42A9DF #425BDF

triadic

#42A9DF #DF42A9 #A9DF42

tetradic

#42A9DF #C742DF #DF7842 #5BDF42

square

#42A9DF #C742DF #DF7842 #5BDF42

split-complementary

#42A9DF #DF425B #DFC742

monochromatic

#18668E #218BC3 #42A9DF #76C1E8 #ABD9F1

Accessibility & contrast

On white

2.63

#42A9DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.97

#42A9DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A9DF

7.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A9DF	#FFFFFF	#000000	##000000
##42A9DF	1.00	2.63	7.97	7.97
#FFFFFF	2.63	1.00	21.00	21.00
#000000	7.97	21.00	1.00	1.00
##000000	7.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8FA8E2

Deuteranopia (green-blind)

#7A99DE

Tritanopia (blue-blind)

#00B7BB

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #42a9df;
/* rgb */ color: rgb(66, 169, 223);
/* oklch */ color: oklch(69.8% 0.122 235.4);

Tailwind

colors: {
  custom: {
    50: '#89c2e9',
    500: '#42a9df',
    950: '#000000',
  },
}

SCSS

$custom: #42a9df;
$custom-light: #89c2e9;
$custom-dark: #000000;

JSON

{
  "hex": "#42a9df",
  "rgb": {
    "r": 66,
    "g": 169,
    "b": 223
  },
  "hsl": {
    "h": 200.637,
    "s": 71.041,
    "l": 56.667
  },
  "oklch": {
    "l": 0.69818,
    "c": 0.12246,
    "h": 235.4
  },
  "luminance": 0.34862
}

Semantic roles & 50–950 ramp

primary

#42A9DF

secondary

#DFB49E

accent

#783AEE

background

#F9FBFE

surface

#F1F7FD

border

#CBD0D5

text

#0D1216

muted

#7E8184

Preview Lab

Preview with #42A9DF

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

Preview Lab → · Contrast checker → · Palette generator →