#42A3B9#42A3B9

#42A3B9 is a light, moderate cyan. Relative luminance 0.309; OKLCH L 66.7% C 0.095 H 215.4°. Best body text is #000000 at 7.17:1 contrast (WCAG AA passes).

Color values

HEX	#42A3B9
RGB	rgb(66, 163, 185)
HSL	hsl(191, 47%, 49%)
HSV	hsv(191, 64%, 73%)
CMYK	cmyk(64.3%, 11.9%, 0%, 27.5%)
CIE-LAB	lab(62.38, -21.40, -19.75)
CIE-LCH	lch(62.38, 29.12, 222.69°)
OKLab	oklab(66.73% -0.0774 -0.0549)
OKLCH	oklch(66.73% 0.095 215.4)
XYZ	xyz(24.0973, 30.8529, 50.5748)
Luminance	0.3085 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A3B9 #B95842

analogous

#42B993 #42A3B9 #4268B9

triadic

#42A3B9 #B942A3 #A3B942

tetradic

#42A3B9 #9342B9 #B95842 #68B942

square

#42A3B9 #9342B9 #B95842 #68B942

split-complementary

#42A3B9 #B94268 #B99342

monochromatic

#22545F #327B8C #42A3B9 #6DBACB #9ACFDB

Accessibility & contrast

On white

2.93

#42A3B9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.17

#42A3B9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A3B9

7.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A3B9	#FFFFFF	#000000	##000000
##42A3B9	1.00	2.93	7.17	7.17
#FFFFFF	2.93	1.00	21.00	21.00
#000000	7.17	21.00	1.00	1.00
##000000	7.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#949EBA

Deuteranopia (green-blind)

#8291B9

Tritanopia (blue-blind)

#00ABAA

Achromatopsia (no color)

#979797

Design tokens & code

CSS

--color: #42a3b9;
/* rgb */ color: rgb(66, 163, 185);
/* oklch */ color: oklch(66.7% 0.095 215.4);

Tailwind

colors: {
  custom: {
    50: '#84bece',
    500: '#42a3b9',
    950: '#000000',
  },
}

SCSS

$custom: #42a3b9;
$custom-light: #84bece;
$custom-dark: #000000;

JSON

{
  "hex": "#42a3b9",
  "rgb": {
    "r": 66,
    "g": 163,
    "b": 185
  },
  "hsl": {
    "h": 191.092,
    "s": 47.41,
    "l": 49.216
  },
  "oklch": {
    "l": 0.66726,
    "c": 0.09486,
    "h": 215.4
  },
  "luminance": 0.30855
}

Semantic roles & 50–950 ramp

primary

#42A3B9

secondary

#C79A90

accent

#6A51D7

background

#F8FBFC

surface

#F0F7F9

border

#CBD0D2

text

#0C1213

muted

#7D8182

Preview Lab

Preview with #42A3B9

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

Preview Lab → · Contrast checker → · Palette generator →