#42B9DA#42B9DA

#42B9DA is a light, moderate cyan. Relative luminance 0.409; OKLCH L 73.3% C 0.114 H 220.1°. Best body text is #000000 at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#42B9DA
RGB	rgb(66, 185, 218)
HSL	hsl(193, 67%, 56%)
HSV	hsv(193, 70%, 85%)
CMYK	cmyk(69.7%, 15.1%, 0%, 14.5%)
CIE-LAB	lab(70.12, -22.47, -26.18)
CIE-LCH	lch(70.12, 34.50, 229.36°)
OKLab	oklab(73.33% -0.0869 -0.0731)
OKLCH	oklch(73.33% 0.114 220.1)
XYZ	xyz(32.2454, 40.9145, 72.5139)
Luminance	0.4092 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B9DA #DA6342

analogous

#42DAAF #42B9DA #426DDA

triadic

#42B9DA #DA42B9 #B9DA42

tetradic

#42B9DA #AF42DA #DA6342 #6DDA42

square

#42B9DA #AF42DA #DA6342 #6DDA42

split-complementary

#42B9DA #DA426D #DAAF42

monochromatic

#1A7087 #249ABA #42B9DA #75CCE4 #A8DFEE

Accessibility & contrast

On white

2.29

#42B9DA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.18

#42B9DA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B9DA

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B9DA	#FFFFFF	#000000	##000000
##42B9DA	1.00	2.29	9.18	9.18
#FFFFFF	2.29	1.00	21.00	21.00
#000000	9.18	21.00	1.00	1.00
##000000	9.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B4DC

Deuteranopia (green-blind)

#90A5DA

Tritanopia (blue-blind)

#00C4C3

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #42b9da;
/* rgb */ color: rgb(66, 185, 218);
/* oklch */ color: oklch(73.3% 0.114 220.1);

Tailwind

colors: {
  custom: {
    50: '#89cee5',
    500: '#42b9da',
    950: '#000000',
  },
}

SCSS

$custom: #42b9da;
$custom-light: #89cee5;
$custom-dark: #000000;

JSON

{
  "hex": "#42b9da",
  "rgb": {
    "r": 66,
    "g": 185,
    "b": 218
  },
  "hsl": {
    "h": 193.026,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.73331,
    "c": 0.11357,
    "h": 220.1
  },
  "luminance": 0.40918
}

Semantic roles & 50–950 ramp

primary

#42B9DA

secondary

#DBAA9C

accent

#633EEA

background

#F9FCFE

surface

#F1F9FC

border

#CBD2D5

text

#0D1315

muted

#7E8284

Preview Lab

Preview with #42B9DA

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

Preview Lab → · Contrast checker → · Palette generator →