#1F429F#1F429F

#1F429F is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.4% C 0.157 H 264.7°. Best body text is #FFFFFF at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#1F429F
RGB	rgb(31, 66, 159)
HSL	hsl(224, 67%, 37%)
HSV	hsv(224, 81%, 62%)
CMYK	cmyk(80.5%, 58.5%, 0%, 37.6%)
CIE-LAB	lab(31.09, 22.96, -53.99)
CIE-LCH	lch(31.09, 58.67, 293.03°)
OKLab	oklab(41.44% -0.0145 -0.156)
OKLCH	oklch(41.44% 0.157 264.7)
XYZ	xyz(8.7691, 6.6899, 33.6233)
Luminance	0.0669 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F429F #9F7C1F

analogous

#1F829F #1F429F #3C1F9F

triadic

#1F429F #9F1F42 #429F1F

tetradic

#1F429F #9F1F82 #9F7C1F #1F9F3C

square

#1F429F #9F1F82 #9F7C1F #1F9F3C

split-complementary

#1F429F #9F3C1F #829F1F

monochromatic

#0B1739 #152D6C #1F429F #2957D2 #5A7EDF

Accessibility & contrast

On white

8.98

#1F429F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#1F429F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F429F

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F429F	#FFFFFF	#000000	##FFFFFF
##1F429F	1.00	8.98	2.34	8.98
#FFFFFF	8.98	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA2

Deuteranopia (green-blind)

#00439D

Tritanopia (blue-blind)

#00596A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1f429f;
/* rgb */ color: rgb(31, 66, 159);
/* oklch */ color: oklch(41.4% 0.157 264.7);

Tailwind

colors: {
  custom: {
    50: '#7175bc',
    500: '#1f429f',
    950: '#000000',
  },
}

SCSS

$custom: #1f429f;
$custom-light: #7175bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f429f",
  "rgb": {
    "r": 31,
    "g": 66,
    "b": 159
  },
  "hsl": {
    "h": 223.594,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.41435,
    "c": 0.15665,
    "h": 264.7
  },
  "luminance": 0.06691
}

Semantic roles & 50–950 ramp

primary

#1F429F

secondary

#C3A557

accent

#BB3EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F429F

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

Preview Lab → · Contrast checker → · Palette generator →