#42B8D9#42B8D9

#42B8D9 is a light, moderate cyan. Relative luminance 0.404; OKLCH L 73.1% C 0.113 H 220.2°. Best body text is #000000 at 9.09:1 contrast (WCAG AA passes).

Color values

HEX	#42B8D9
RGB	rgb(66, 184, 217)
HSL	hsl(193, 67%, 55%)
HSV	hsv(193, 70%, 85%)
CMYK	cmyk(69.6%, 15.2%, 0%, 14.9%)
CIE-LAB	lab(69.79, -22.27, -26.14)
CIE-LCH	lch(69.79, 34.34, 229.57°)
OKLab	oklab(73.05% -0.0863 -0.073)
OKLCH	oklch(73.05% 0.113 220.2)
XYZ	xyz(31.9065, 40.4454, 71.7574)
Luminance	0.4045 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B8D9 #D96342

analogous

#42D9AF #42B8D9 #426CD9

triadic

#42B8D9 #D942B8 #B8D942

tetradic

#42B8D9 #AF42D9 #D96342 #6CD942

square

#42B8D9 #AF42D9 #D96342 #6CD942

split-complementary

#42B8D9 #D9426C #D9AF42

monochromatic

#1B6E86 #2598B9 #42B8D9 #75CBE3 #A8DEED

Accessibility & contrast

On white

2.31

#42B8D9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.09

#42B8D9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B8D9

9.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B8D9	#FFFFFF	#000000	##000000
##42B8D9	1.00	2.31	9.09	9.09
#FFFFFF	2.31	1.00	21.00	21.00
#000000	9.09	21.00	1.00	1.00
##000000	9.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B3DB

Deuteranopia (green-blind)

#8FA4D9

Tritanopia (blue-blind)

#00C3C2

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #42b8d9;
/* rgb */ color: rgb(66, 184, 217);
/* oklch */ color: oklch(73.1% 0.113 220.2);

Tailwind

colors: {
  custom: {
    50: '#89cde4',
    500: '#42b8d9',
    950: '#000000',
  },
}

SCSS

$custom: #42b8d9;
$custom-light: #89cde4;
$custom-dark: #000000;

JSON

{
  "hex": "#42b8d9",
  "rgb": {
    "r": 66,
    "g": 184,
    "b": 217
  },
  "hsl": {
    "h": 193.113,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.73053,
    "c": 0.11303,
    "h": 220.2
  },
  "luminance": 0.40449
}

Semantic roles & 50–950 ramp

primary

#42B8D9

secondary

#DBAA9C

accent

#643EE9

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B8D9

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

Preview Lab → · Contrast checker → · Palette generator →