#1F42B2#1F42B2

#1F42B2 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.1% C 0.182 H 265.6°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#1F42B2
RGB	rgb(31, 66, 178)
HSL	hsl(226, 70%, 41%)
HSV	hsv(226, 83%, 70%)
CMYK	cmyk(82.6%, 62.9%, 0%, 30.2%)
CIE-LAB	lab(32.70, 30.34, -62.75)
CIE-LCH	lch(32.70, 69.70, 295.81°)
OKLab	oklab(43.14% -0.0141 -0.1816)
OKLCH	oklch(43.14% 0.182 265.6)
XYZ	xyz(10.5463, 7.4008, 42.9835)
Luminance	0.0740 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F42B2 #B28F1F

analogous

#1F8BB2 #1F42B2 #451FB2

triadic

#1F42B2 #B21F42 #42B21F

tetradic

#1F42B2 #B21F8B #B28F1F #1FB245

square

#1F42B2 #B21F8B #B28F1F #1FB245

split-complementary

#1F42B2 #B2451F #8BB21F

monochromatic

#0D1B4A #162F7E #1F42B2 #335BDB #6785E5

Accessibility & contrast

On white

8.47

#1F42B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#1F42B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F42B2

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F42B2	#FFFFFF	#000000	##FFFFFF
##1F42B2	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B6

Deuteranopia (green-blind)

#0046B0

Tritanopia (blue-blind)

#005F73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f42b2;
/* rgb */ color: rgb(31, 66, 178);
/* oklch */ color: oklch(43.1% 0.182 265.6);

Tailwind

colors: {
  custom: {
    50: '#7576ca',
    500: '#1f42b2',
    950: '#000000',
  },
}

SCSS

$custom: #1f42b2;
$custom-light: #7576ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1f42b2",
  "rgb": {
    "r": 31,
    "g": 66,
    "b": 178
  },
  "hsl": {
    "h": 225.714,
    "s": 70.335,
    "l": 40.98
  },
  "oklch": {
    "l": 0.43137,
    "c": 0.18218,
    "h": 265.6
  },
  "luminance": 0.07402
}

Semantic roles & 50–950 ramp

primary

#1F42B2

secondary

#CAB163

accent

#C33BED

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F42B2

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

Preview Lab → · Contrast checker → · Palette generator →