#42A4BB#42A4BB

#42A4BB is a light, moderate cyan. Relative luminance 0.313; OKLCH L 67.0% C 0.096 H 216.0°. Best body text is #000000 at 7.26:1 contrast (WCAG AA passes).

Color values

HEX	#42A4BB
RGB	rgb(66, 164, 187)
HSL	hsl(191, 48%, 50%)
HSV	hsv(191, 65%, 73%)
CMYK	cmyk(64.7%, 12.3%, 0%, 26.7%)
CIE-LAB	lab(62.76, -21.30, -20.30)
CIE-LCH	lch(62.76, 29.43, 223.61°)
OKLab	oklab(67.05% -0.0776 -0.0564)
OKLCH	oklch(67.05% 0.096 216)
XYZ	xyz(24.4882, 31.2944, 51.7539)
Luminance	0.3130 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A4BB #BB5942

analogous

#42BB96 #42A4BB #4268BB

triadic

#42A4BB #BB42A4 #A4BB42

tetradic

#42A4BB #9642BB #BB5942 #68BB42

square

#42A4BB #9642BB #BB5942 #68BB42

split-complementary

#42A4BB #BB4268 #BB9642

monochromatic

#225561 #327C8E #42A4BB #6EBACC #9CD0DC

Accessibility & contrast

On white

2.89

#42A4BB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.26

#42A4BB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A4BB

7.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A4BB	#FFFFFF	#000000	##000000
##42A4BB	1.00	2.89	7.26	7.26
#FFFFFF	2.89	1.00	21.00	21.00
#000000	7.26	21.00	1.00	1.00
##000000	7.26	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#949FBC

Deuteranopia (green-blind)

#8392BB

Tritanopia (blue-blind)

#00ACAB

Achromatopsia (no color)

#989898

Design tokens & code

CSS

--color: #42a4bb;
/* rgb */ color: rgb(66, 164, 187);
/* oklch */ color: oklch(67.0% 0.096 216.0);

Tailwind

colors: {
  custom: {
    50: '#84bfcf',
    500: '#42a4bb',
    950: '#000000',
  },
}

SCSS

$custom: #42a4bb;
$custom-light: #84bfcf;
$custom-dark: #000000;

JSON

{
  "hex": "#42a4bb",
  "rgb": {
    "r": 66,
    "g": 164,
    "b": 187
  },
  "hsl": {
    "h": 191.405,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.67049,
    "c": 0.09598,
    "h": 216
  },
  "luminance": 0.31297
}

Semantic roles & 50–950 ramp

primary

#42A4BB

secondary

#C89B91

accent

#6A50D7

background

#F8FBFC

surface

#F0F7F9

border

#CBD0D2

text

#0C1213

muted

#7D8182

Preview Lab

Preview with #42A4BB

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

Preview Lab → · Contrast checker → · Palette generator →