#1F429B#1F429B

#1F429B is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.1% C 0.151 H 264.4°. Best body text is #FFFFFF at 9.09:1 contrast (WCAG AA passes).

Color values

HEX	#1F429B
RGB	rgb(31, 66, 155)
HSL	hsl(223, 67%, 36%)
HSV	hsv(223, 80%, 61%)
CMYK	cmyk(80%, 57.4%, 0%, 39.2%)
CIE-LAB	lab(30.77, 21.37, -52.09)
CIE-LCH	lch(30.77, 56.31, 292.31°)
OKLab	oklab(41.09% -0.0148 -0.1504)
OKLCH	oklch(41.09% 0.151 264.4)
XYZ	xyz(8.4276, 6.5533, 31.8247)
Luminance	0.0655 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F429B #9B781F

analogous

#1F809B #1F429B #3A1F9B

triadic

#1F429B #9B1F42 #429B1F

tetradic

#1F429B #9B1F80 #9B781F #1F9B3A

square

#1F429B #9B1F80 #9B781F #1F9B3A

split-complementary

#1F429B #9B3A1F #809B1F

monochromatic

#0B1735 #152C68 #1F429B #2958CE #577DDD

Accessibility & contrast

On white

9.09

#1F429B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#1F429B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F429B

9.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F429B	#FFFFFF	#000000	##FFFFFF
##1F429B	1.00	9.09	2.31	9.09
#FFFFFF	9.09	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004E9E

Deuteranopia (green-blind)

#004399

Tritanopia (blue-blind)

#005868

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f429b;
/* rgb */ color: rgb(31, 66, 155);
/* oklch */ color: oklch(41.1% 0.151 264.4);

Tailwind

colors: {
  custom: {
    50: '#7075b9',
    500: '#1f429b',
    950: '#000000',
  },
}

SCSS

$custom: #1f429b;
$custom-light: #7075b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f429b",
  "rgb": {
    "r": 31,
    "g": 66,
    "b": 155
  },
  "hsl": {
    "h": 223.065,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.41091,
    "c": 0.15111,
    "h": 264.4
  },
  "luminance": 0.06554
}

Semantic roles & 50–950 ramp

primary

#1F429B

secondary

#C1A255

accent

#B93EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F429B

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

Preview Lab → · Contrast checker → · Palette generator →