#042AFF#042AFF

#042AFF is a mid, highly saturated blue. Relative luminance 0.089; OKLCH L 47.6% C 0.297 H 264.4°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#042AFF
RGB	rgb(4, 42, 255)
HSL	hsl(231, 100%, 51%)
HSV	hsv(231, 98%, 100%)
CMYK	cmyk(98.4%, 83.5%, 0%, 0%)
CIE-LAB	lab(35.79, 68.72, -102.03)
CIE-LCH	lch(35.79, 123.01, 303.96°)
OKLab	oklab(47.6% -0.0288 -0.2956)
OKLCH	oklch(47.6% 0.297 264.4)
XYZ	xyz(18.9217, 8.8991, 95.3087)
Luminance	0.0890 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#042AFF #FFD904

analogous

#04A8FF #042AFF #5B04FF

triadic

#042AFF #FF042A #2AFF04

tetradic

#042AFF #FF04A8 #FFD904 #04FF5B

square

#042AFF #FF04A8 #FFD904 #04FF5B

split-complementary

#042AFF #FF5B04 #A8FF04

monochromatic

#001589 #001EC6 #042AFF #415EFF #7E92FF

Accessibility & contrast

On white

7.55

#042AFF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#042AFF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #042AFF

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##042AFF	#FFFFFF	#000000	##FFFFFF
##042AFF	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060FF

Deuteranopia (green-blind)

#0047FC

Tritanopia (blue-blind)

#007299

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #042aff;
/* rgb */ color: rgb(4, 42, 255);
/* oklch */ color: oklch(47.6% 0.297 264.4);

Tailwind

colors: {
  custom: {
    50: '#896aff',
    500: '#042aff',
    950: '#000000',
  },
}

SCSS

$custom: #042aff;
$custom-light: #896aff;
$custom-dark: #000000;

JSON

{
  "hex": "#042aff",
  "rgb": {
    "r": 4,
    "g": 42,
    "b": 255
  },
  "hsl": {
    "h": 230.916,
    "s": 100,
    "l": 50.784
  },
  "oklch": {
    "l": 0.47596,
    "c": 0.29696,
    "h": 264.4
  },
  "luminance": 0.08902
}

Semantic roles & 50–950 ramp

primary

#042AFF

secondary

#E7D678

accent

#DF29FF

background

#F9F6FF

surface

#F2EBFF

border

#CCC6D7

text

#0F0718

muted

#7E7A86

Preview Lab

Preview with #042AFF

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

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