#42B4D9#42B4D9

#42B4D9 is a light, moderate cyan. Relative luminance 0.388; OKLCH L 72.1% C 0.114 H 223.5°. Best body text is #000000 at 8.76:1 contrast (WCAG AA passes).

Color values

HEX	#42B4D9
RGB	rgb(66, 180, 217)
HSL	hsl(195, 67%, 55%)
HSV	hsv(195, 70%, 85%)
CMYK	cmyk(69.6%, 17.1%, 0%, 14.9%)
CIE-LAB	lab(68.61, -20.21, -27.94)
CIE-LCH	lch(68.61, 34.48, 234.13°)
OKLab	oklab(72.11% -0.0824 -0.0781)
OKLCH	oklch(72.11% 0.114 223.5)
XYZ	xyz(31.0873, 38.8070, 71.4843)
Luminance	0.3881 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B4D9 #D96742

analogous

#42D9B2 #42B4D9 #4268D9

triadic

#42B4D9 #D942B4 #B4D942

tetradic

#42B4D9 #B242D9 #D96742 #68D942

square

#42B4D9 #B242D9 #D96742 #68D942

split-complementary

#42B4D9 #D94268 #D9B242

monochromatic

#1B6C86 #2595B9 #42B4D9 #75C8E3 #A8DCED

Accessibility & contrast

On white

2.40

#42B4D9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.76

#42B4D9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4D9

8.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B4D9	#FFFFFF	#000000	##000000
##42B4D9	1.00	2.40	8.76	8.76
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.76	21.00	1.00	1.00
##000000	8.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FB0DB

Deuteranopia (green-blind)

#8AA1D9

Tritanopia (blue-blind)

#00BFC0

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #42b4d9;
/* rgb */ color: rgb(66, 180, 217);
/* oklch */ color: oklch(72.1% 0.114 223.5);

Tailwind

colors: {
  custom: {
    50: '#89cae4',
    500: '#42b4d9',
    950: '#000000',
  },
}

SCSS

$custom: #42b4d9;
$custom-light: #89cae4;
$custom-dark: #000000;

JSON

{
  "hex": "#42b4d9",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 217
  },
  "hsl": {
    "h": 194.702,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.72112,
    "c": 0.11352,
    "h": 223.5
  },
  "luminance": 0.38811
}

Semantic roles & 50–950 ramp

primary

#42B4D9

secondary

#DBAB9C

accent

#683EE9

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B4D9

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

Preview Lab → · Contrast checker → · Palette generator →