#42A5BB#42A5BB

#42A5BB is a light, moderate cyan. Relative luminance 0.317; OKLCH L 67.3% C 0.096 H 215.0°. Best body text is #000000 at 7.33:1 contrast (WCAG AA passes).

Color values

HEX	#42A5BB
RGB	rgb(66, 165, 187)
HSL	hsl(191, 48%, 50%)
HSV	hsv(191, 65%, 73%)
CMYK	cmyk(64.7%, 11.8%, 0%, 26.7%)
CIE-LAB	lab(63.06, -21.82, -19.84)
CIE-LCH	lch(63.06, 29.49, 222.28°)
OKLab	oklab(67.29% -0.0787 -0.0552)
OKLCH	oklch(67.29% 0.096 215)
XYZ	xyz(24.6678, 31.6537, 51.8138)
Luminance	0.3166 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A5BB #BB5842

analogous

#42BB95 #42A5BB #4269BB

triadic

#42A5BB #BB42A5 #A5BB42

tetradic

#42A5BB #9542BB #BB5842 #69BB42

square

#42A5BB #9542BB #BB5842 #69BB42

split-complementary

#42A5BB #BB4269 #BB9542

monochromatic

#225561 #327D8E #42A5BB #6EBBCC #9CD0DC

Accessibility & contrast

On white

2.86

#42A5BB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.33

#42A5BB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A5BB

7.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A5BB	#FFFFFF	#000000	##000000
##42A5BB	1.00	2.86	7.33	7.33
#FFFFFF	2.86	1.00	21.00	21.00
#000000	7.33	21.00	1.00	1.00
##000000	7.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95A0BC

Deuteranopia (green-blind)

#8493BB

Tritanopia (blue-blind)

#00ADAC

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #42a5bb;
/* rgb */ color: rgb(66, 165, 187);
/* oklch */ color: oklch(67.3% 0.096 215.0);

Tailwind

colors: {
  custom: {
    50: '#84c0cf',
    500: '#42a5bb',
    950: '#000000',
  },
}

SCSS

$custom: #42a5bb;
$custom-light: #84c0cf;
$custom-dark: #000000;

JSON

{
  "hex": "#42a5bb",
  "rgb": {
    "r": 66,
    "g": 165,
    "b": 187
  },
  "hsl": {
    "h": 190.909,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.6729,
    "c": 0.09609,
    "h": 215
  },
  "luminance": 0.31656
}

Semantic roles & 50–950 ramp

primary

#42A5BB

secondary

#C89B91

accent

#6950D7

background

#F8FBFC

surface

#F0F7F9

border

#CBD0D2

text

#0C1213

muted

#7D8182

Preview Lab

Preview with #42A5BB

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

Preview Lab → · Contrast checker → · Palette generator →