#42739B#42739B

#42739B is a mid, moderate cyan. Relative luminance 0.158; OKLCH L 53.8% C 0.083 H 244.8°. Best body text is #FFFFFF at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#42739B
RGB	rgb(66, 115, 155)
HSL	hsl(207, 40%, 43%)
HSV	hsv(207, 57%, 61%)
CMYK	cmyk(57.4%, 25.8%, 0%, 39.2%)
CIE-LAB	lab(46.69, -4.34, -26.66)
CIE-LCH	lch(46.69, 27.01, 260.75°)
OKLab	oklab(53.83% -0.0351 -0.0747)
OKLCH	oklch(53.83% 0.083 244.8)
XYZ	xyz(14.2917, 15.7850, 33.2977)
Luminance	0.1579 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42739B #9B6A42

analogous

#429B96 #42739B #42479B

triadic

#42739B #9B4273 #739B42

tetradic

#42739B #96429B #9B6A42 #479B42

square

#42739B #96429B #9B6A42 #479B42

split-complementary

#42739B #9B4247 #9B9642

monochromatic

#1D3345 #305370 #42739B #5F92BB #8AAFCD

Accessibility & contrast

On white

5.05

#42739B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.16

#42739B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #42739B

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42739B	#FFFFFF	#000000	##FFFFFF
##42739B	1.00	5.05	4.16	5.05
#FFFFFF	5.05	1.00	21.00	1.00
#000000	4.16	21.00	1.00	21.00
##FFFFFF	5.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#62749D

Deuteranopia (green-blind)

#566B9A

Tritanopia (blue-blind)

#007D81

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #42739b;
/* rgb */ color: rgb(66, 115, 155);
/* oklch */ color: oklch(53.8% 0.083 244.8);

Tailwind

colors: {
  custom: {
    50: '#7d9bb8',
    500: '#42739b',
    950: '#000000',
  },
}

SCSS

$custom: #42739b;
$custom-light: #7d9bb8;
$custom-dark: #000000;

JSON

{
  "hex": "#42739b",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 155
  },
  "hsl": {
    "h": 206.966,
    "s": 40.271,
    "l": 43.333
  },
  "oklch": {
    "l": 0.53827,
    "c": 0.08258,
    "h": 244.8
  },
  "luminance": 0.15786
}

Semantic roles & 50–950 ramp

primary

#42739B

secondary

#B89A81

accent

#8E58D0

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0E11

muted

#7C7E80

Preview Lab

Preview with #42739B

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

Preview Lab → · Contrast checker → · Palette generator →