#42A5BC#42A5BC

#42A5BC is a light, moderate cyan. Relative luminance 0.317; OKLCH L 67.3% C 0.097 H 215.9°. Best body text is #000000 at 7.34:1 contrast (WCAG AA passes).

Color values

HEX	#42A5BC
RGB	rgb(66, 165, 188)
HSL	hsl(191, 48%, 50%)
HSV	hsv(191, 65%, 74%)
CMYK	cmyk(64.9%, 12.2%, 0%, 26.3%)
CIE-LAB	lab(63.09, -21.51, -20.35)
CIE-LCH	lch(63.09, 29.61, 223.40°)
OKLab	oklab(67.33% -0.0783 -0.0566)
OKLCH	oklch(67.33% 0.097 215.9)
XYZ	xyz(24.7753, 31.6967, 52.3796)
Luminance	0.3170 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A5BC #BC5942

analogous

#42BC96 #42A5BC #4268BC

triadic

#42A5BC #BC42A5 #A5BC42

tetradic

#42A5BC #9642BC #BC5942 #68BC42

square

#42A5BC #9642BC #BC5942 #68BC42

split-complementary

#42A5BC #BC4268 #BC9642

monochromatic

#225561 #327D8F #42A5BC #6FBBCC #9CD0DC

Accessibility & contrast

On white

2.86

#42A5BC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.34

#42A5BC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A5BC

7.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A5BC	#FFFFFF	#000000	##000000
##42A5BC	1.00	2.86	7.34	7.34
#FFFFFF	2.86	1.00	21.00	21.00
#000000	7.34	21.00	1.00	1.00
##000000	7.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95A0BD

Deuteranopia (green-blind)

#8493BC

Tritanopia (blue-blind)

#00ADAC

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #42a5bc;
/* rgb */ color: rgb(66, 165, 188);
/* oklch */ color: oklch(67.3% 0.097 215.9);

Tailwind

colors: {
  custom: {
    50: '#84c0d0',
    500: '#42a5bc',
    950: '#000000',
  },
}

SCSS

$custom: #42a5bc;
$custom-light: #84c0d0;
$custom-dark: #000000;

JSON

{
  "hex": "#42a5bc",
  "rgb": {
    "r": 66,
    "g": 165,
    "b": 188
  },
  "hsl": {
    "h": 191.311,
    "s": 48.031,
    "l": 49.804
  },
  "oklch": {
    "l": 0.67331,
    "c": 0.09659,
    "h": 215.9
  },
  "luminance": 0.31699
}

Semantic roles & 50–950 ramp

primary

#42A5BC

secondary

#C99C91

accent

#6A50D8

background

#F8FBFC

surface

#F0F7F9

border

#CBD0D2

text

#0C1214

muted

#7D8182

Preview Lab

Preview with #42A5BC

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

Preview Lab → · Contrast checker → · Palette generator →