#42A5CE#42A5CE

#42A5CE is a light, moderate cyan. Relative luminance 0.325; OKLCH L 68.1% C 0.109 H 229.0°. Best body text is #000000 at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#42A5CE
RGB	rgb(66, 165, 206)
HSL	hsl(198, 59%, 53%)
HSV	hsv(198, 68%, 81%)
CMYK	cmyk(68%, 19.9%, 0%, 19.2%)
CIE-LAB	lab(63.77, -15.82, -29.33)
CIE-LCH	lch(63.77, 33.33, 241.66°)
OKLab	oklab(68.1% -0.0714 -0.0822)
OKLCH	oklch(68.1% 0.109 229)
XYZ	xyz(26.8380, 32.5218, 63.2435)
Luminance	0.3252 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A5CE #CE6B42

analogous

#42CEB1 #42A5CE #425FCE

triadic

#42A5CE #CE42A5 #A5CE42

tetradic

#42A5CE #B142CE #CE6B42 #5FCE42

square

#42A5CE #B142CE #CE6B42 #5FCE42

split-complementary

#42A5CE #CE425F #CEB142

monochromatic

#1F5D77 #2B83A7 #42A5CE #73BCDB #A3D3E7

Accessibility & contrast

On white

2.80

#42A5CE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.50

#42A5CE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A5CE

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A5CE	#FFFFFF	#000000	##000000
##42A5CE	1.00	2.80	7.50	7.50
#FFFFFF	2.80	1.00	21.00	21.00
#000000	7.50	21.00	1.00	1.00
##000000	7.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#90A2D0

Deuteranopia (green-blind)

#7C94CD

Tritanopia (blue-blind)

#00B1B2

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #42a5ce;
/* rgb */ color: rgb(66, 165, 206);
/* oklch */ color: oklch(68.1% 0.109 229.0);

Tailwind

colors: {
  custom: {
    50: '#86bfdd',
    500: '#42a5ce',
    950: '#000000',
  },
}

SCSS

$custom: #42a5ce;
$custom-light: #86bfdd;
$custom-dark: #000000;

JSON

{
  "hex": "#42a5ce",
  "rgb": {
    "r": 66,
    "g": 165,
    "b": 206
  },
  "hsl": {
    "h": 197.571,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.68101,
    "c": 0.10886,
    "h": 229
  },
  "luminance": 0.32525
}

Semantic roles & 50–950 ramp

primary

#42A5CE

secondary

#D4A998

accent

#7446E2

background

#F8FBFD

surface

#F0F7FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A5CE

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

Preview Lab → · Contrast checker → · Palette generator →