#42A5CD#42A5CD

#42A5CD is a light, moderate cyan. Relative luminance 0.325; OKLCH L 68.1% C 0.108 H 228.4°. Best body text is #000000 at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#42A5CD
RGB	rgb(66, 165, 205)
HSL	hsl(197, 58%, 53%)
HSV	hsv(197, 68%, 80%)
CMYK	cmyk(67.8%, 19.5%, 0%, 19.6%)
CIE-LAB	lab(63.73, -16.14, -28.84)
CIE-LCH	lch(63.73, 33.05, 240.76°)
OKLab	oklab(68.06% -0.0718 -0.0807)
OKLCH	oklch(68.06% 0.108 228.4)
XYZ	xyz(26.7169, 32.4734, 62.6057)
Luminance	0.3248 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A5CD #CD6A42

analogous

#42CDAF #42A5CD #425FCD

triadic

#42A5CD #CD42A5 #A5CD42

tetradic

#42A5CD #AF42CD #CD6A42 #5FCD42

square

#42A5CD #AF42CD #CD6A42 #5FCD42

split-complementary

#42A5CD #CD425F #CDAF42

monochromatic

#1F5D76 #2C83A6 #42A5CD #72BCDA #A3D3E7

Accessibility & contrast

On white

2.80

#42A5CD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.50

#42A5CD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A5CD

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A5CD	#FFFFFF	#000000	##000000
##42A5CD	1.00	2.80	7.50	7.50
#FFFFFF	2.80	1.00	21.00	21.00
#000000	7.50	21.00	1.00	1.00
##000000	7.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#90A2CF

Deuteranopia (green-blind)

#7D94CC

Tritanopia (blue-blind)

#00B0B2

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #42a5cd;
/* rgb */ color: rgb(66, 165, 205);
/* oklch */ color: oklch(68.1% 0.108 228.4);

Tailwind

colors: {
  custom: {
    50: '#86bfdc',
    500: '#42a5cd',
    950: '#000000',
  },
}

SCSS

$custom: #42a5cd;
$custom-light: #86bfdc;
$custom-dark: #000000;

JSON

{
  "hex": "#42a5cd",
  "rgb": {
    "r": 66,
    "g": 165,
    "b": 205
  },
  "hsl": {
    "h": 197.266,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.68056,
    "c": 0.10804,
    "h": 228.4
  },
  "luminance": 0.32476
}

Semantic roles & 50–950 ramp

primary

#42A5CD

secondary

#D3A997

accent

#7346E1

background

#F8FBFD

surface

#F0F7FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A5CD

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

Preview Lab → · Contrast checker → · Palette generator →