#42B5DB#42B5DB

#42B5DB is a light, moderate cyan. Relative luminance 0.393; OKLCH L 72.4% C 0.115 H 223.9°. Best body text is #000000 at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#42B5DB
RGB	rgb(66, 181, 219)
HSL	hsl(195, 68%, 56%)
HSV	hsv(195, 70%, 86%)
CMYK	cmyk(69.9%, 17.4%, 0%, 14.1%)
CIE-LAB	lab(68.98, -20.09, -28.47)
CIE-LCH	lch(68.98, 34.85, 234.79°)
OKLab	oklab(72.43% -0.0826 -0.0796)
OKLCH	oklch(72.43% 0.115 223.9)
XYZ	xyz(31.5516, 39.3169, 72.9302)
Luminance	0.3932 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B5DB #DB6842

analogous

#42DBB4 #42B5DB #4268DB

triadic

#42B5DB #DB42B5 #B5DB42

tetradic

#42B5DB #B442DB #DB6842 #68DB42

square

#42B5DB #B442DB #DB6842 #68DB42

split-complementary

#42B5DB #DB4268 #DBB442

monochromatic

#1A6D89 #2496BC #42B5DB #75C9E5 #A9DDEF

Accessibility & contrast

On white

2.37

#42B5DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.86

#42B5DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B5DB

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B5DB	#FFFFFF	#000000	##000000
##42B5DB	1.00	2.37	8.86	8.86
#FFFFFF	2.37	1.00	21.00	21.00
#000000	8.86	21.00	1.00	1.00
##000000	8.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0B1DD

Deuteranopia (green-blind)

#8BA2DB

Tritanopia (blue-blind)

#00C1C1

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #42b5db;
/* rgb */ color: rgb(66, 181, 219);
/* oklch */ color: oklch(72.4% 0.115 223.9);

Tailwind

colors: {
  custom: {
    50: '#89cbe6',
    500: '#42b5db',
    950: '#000000',
  },
}

SCSS

$custom: #42b5db;
$custom-light: #89cbe6;
$custom-dark: #000000;

JSON

{
  "hex": "#42b5db",
  "rgb": {
    "r": 66,
    "g": 181,
    "b": 219
  },
  "hsl": {
    "h": 194.902,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.72432,
    "c": 0.11474,
    "h": 223.9
  },
  "luminance": 0.3932
}

Semantic roles & 50–950 ramp

primary

#42B5DB

secondary

#DCAC9D

accent

#683DEB

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #42B5DB

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

Preview Lab → · Contrast checker → · Palette generator →