#42A3CB#42A3CB

#42A3CB is a light, moderate cyan. Relative luminance 0.317; OKLCH L 67.5% C 0.107 H 228.8°. Best body text is #000000 at 7.33:1 contrast (WCAG AA passes).

Color values

HEX	#42A3CB
RGB	rgb(66, 163, 203)
HSL	hsl(198, 57%, 53%)
HSV	hsv(198, 67%, 80%)
CMYK	cmyk(67.5%, 19.7%, 0%, 20.4%)
CIE-LAB	lab(63.06, -15.72, -28.76)
CIE-LCH	lch(63.06, 32.77, 241.35°)
OKLab	oklab(67.5% -0.0705 -0.0805)
OKLCH	oklch(67.5% 0.107 228.8)
XYZ	xyz(26.1192, 31.6616, 61.2231)
Luminance	0.3166 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A3CB #CB6A42

analogous

#42CBAE #42A3CB #425FCB

triadic

#42A3CB #CB42A3 #A3CB42

tetradic

#42A3CB #AE42CB #CB6A42 #5FCB42

square

#42A3CB #AE42CB #CB6A42 #5FCB42

split-complementary

#42A3CB #CB425F #CBAE42

monochromatic

#205B73 #2D80A3 #42A3CB #72BAD8 #A2D2E5

Accessibility & contrast

On white

2.86

#42A3CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.33

#42A3CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A3CB

7.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A3CB	#FFFFFF	#000000	##000000
##42A3CB	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)

#8EA0CD

Deuteranopia (green-blind)

#7B93CA

Tritanopia (blue-blind)

#00AEB0

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #42a3cb;
/* rgb */ color: rgb(66, 163, 203);
/* oklch */ color: oklch(67.5% 0.107 228.8);

Tailwind

colors: {
  custom: {
    50: '#86bedb',
    500: '#42a3cb',
    950: '#000000',
  },
}

SCSS

$custom: #42a3cb;
$custom-light: #86bedb;
$custom-dark: #000000;

JSON

{
  "hex": "#42a3cb",
  "rgb": {
    "r": 66,
    "g": 163,
    "b": 203
  },
  "hsl": {
    "h": 197.518,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.67495,
    "c": 0.10701,
    "h": 228.8
  },
  "luminance": 0.31664
}

Semantic roles & 50–950 ramp

primary

#42A3CB

secondary

#D2A897

accent

#7448E0

background

#F8FBFD

surface

#F0F6FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A3CB

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

Preview Lab → · Contrast checker → · Palette generator →