#42A3BB#42A3BB

#42A3BB is a light, moderate cyan. Relative luminance 0.309; OKLCH L 66.8% C 0.096 H 217.0°. Best body text is #000000 at 7.19:1 contrast (WCAG AA passes).

Color values

HEX	#42A3BB
RGB	rgb(66, 163, 187)
HSL	hsl(192, 48%, 50%)
HSV	hsv(192, 65%, 73%)
CMYK	cmyk(64.7%, 12.8%, 0%, 26.7%)
CIE-LAB	lab(62.46, -20.78, -20.76)
CIE-LCH	lch(62.46, 29.37, 224.96°)
OKLab	oklab(66.81% -0.0766 -0.0577)
OKLCH	oklch(66.81% 0.096 217)
XYZ	xyz(24.3099, 30.9379, 51.6945)
Luminance	0.3094 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A3BB #BB5A42

analogous

#42BB97 #42A3BB #4267BB

triadic

#42A3BB #BB42A3 #A3BB42

tetradic

#42A3BB #9742BB #BB5A42 #67BB42

square

#42A3BB #9742BB #BB5A42 #67BB42

split-complementary

#42A3BB #BB4267 #BB9742

monochromatic

#225461 #327C8E #42A3BB #6EB9CC #9CCFDC

Accessibility & contrast

On white

2.92

#42A3BB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.19

#42A3BB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A3BB

7.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A3BB	#FFFFFF	#000000	##000000
##42A3BB	1.00	2.92	7.19	7.19
#FFFFFF	2.92	1.00	21.00	21.00
#000000	7.19	21.00	1.00	1.00
##000000	7.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#939EBC

Deuteranopia (green-blind)

#8291BB

Tritanopia (blue-blind)

#00ACAA

Achromatopsia (no color)

#979797

Design tokens & code

CSS

--color: #42a3bb;
/* rgb */ color: rgb(66, 163, 187);
/* oklch */ color: oklch(66.8% 0.096 217.0);

Tailwind

colors: {
  custom: {
    50: '#84becf',
    500: '#42a3bb',
    950: '#000000',
  },
}

SCSS

$custom: #42a3bb;
$custom-light: #84becf;
$custom-dark: #000000;

JSON

{
  "hex": "#42a3bb",
  "rgb": {
    "r": 66,
    "g": 163,
    "b": 187
  },
  "hsl": {
    "h": 191.901,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.66808,
    "c": 0.09591,
    "h": 217
  },
  "luminance": 0.3094
}

Semantic roles & 50–950 ramp

primary

#42A3BB

secondary

#C89C91

accent

#6B50D7

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0C1213

muted

#7D8182

Preview Lab

Preview with #42A3BB

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

Preview Lab → · Contrast checker → · Palette generator →