#42B8DA#42B8DA

#42B8DA is a light, moderate cyan. Relative luminance 0.405; OKLCH L 73.1% C 0.114 H 220.9°. Best body text is #000000 at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#42B8DA
RGB	rgb(66, 184, 218)
HSL	hsl(193, 67%, 56%)
HSV	hsv(193, 70%, 85%)
CMYK	cmyk(69.7%, 15.6%, 0%, 14.5%)
CIE-LAB	lab(69.82, -21.96, -26.63)
CIE-LCH	lch(69.82, 34.51, 230.50°)
OKLab	oklab(73.1% -0.0859 -0.0744)
OKLCH	oklch(73.1% 0.114 220.9)
XYZ	xyz(32.0369, 40.4975, 72.4444)
Luminance	0.4050 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B8DA #DA6442

analogous

#42DAB0 #42B8DA #426CDA

triadic

#42B8DA #DA42B8 #B8DA42

tetradic

#42B8DA #B042DA #DA6442 #6CDA42

square

#42B8DA #B042DA #DA6442 #6CDA42

split-complementary

#42B8DA #DA426C #DAB042

monochromatic

#1A6F87 #2499BA #42B8DA #75CBE4 #A8DEEE

Accessibility & contrast

On white

2.31

#42B8DA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.10

#42B8DA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8DA

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B8DA	#FFFFFF	#000000	##000000
##42B8DA	1.00	2.31	9.10	9.10
#FFFFFF	2.31	1.00	21.00	21.00
#000000	9.10	21.00	1.00	1.00
##000000	9.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B3DC

Deuteranopia (green-blind)

#8FA4DA

Tritanopia (blue-blind)

#00C3C3

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #42b8da;
/* rgb */ color: rgb(66, 184, 218);
/* oklch */ color: oklch(73.1% 0.114 220.9);

Tailwind

colors: {
  custom: {
    50: '#89cde5',
    500: '#42b8da',
    950: '#000000',
  },
}

SCSS

$custom: #42b8da;
$custom-light: #89cde5;
$custom-dark: #000000;

JSON

{
  "hex": "#42b8da",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 218
  },
  "hsl": {
    "h": 193.421,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.73095,
    "c": 0.11365,
    "h": 220.9
  },
  "luminance": 0.40501
}

Semantic roles & 50–950 ramp

primary

#42B8DA

secondary

#DBAA9C

accent

#643EEA

background

#F9FCFE

surface

#F1F9FC

border

#CBD2D5

text

#0D1315

muted

#7E8284

Preview Lab

Preview with #42B8DA

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

Preview Lab → · Contrast checker → · Palette generator →