#1F398E#1F398E

#1F398E is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.1% C 0.144 H 266.4°. Best body text is #FFFFFF at 10.32:1 contrast (WCAG AA passes).

Color values

HEX	#1F398E
RGB	rgb(31, 57, 142)
HSL	hsl(226, 64%, 34%)
HSV	hsv(226, 78%, 56%)
CMYK	cmyk(78.2%, 59.9%, 0%, 44.3%)
CIE-LAB	lab(27.21, 22.41, -49.92)
CIE-LCH	lch(27.21, 54.72, 294.17°)
OKLab	oklab(38.09% -0.009 -0.1442)
OKLCH	oklch(38.09% 0.144 266.4)
XYZ	xyz(6.9090, 5.1698, 26.2197)
Luminance	0.0517 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F398E #8E741F

analogous

#1F718E #1F398E #3D1F8E

triadic

#1F398E #8E1F39 #398E1F

tetradic

#1F398E #8E1F71 #8E741F #1F8E3D

square

#1F398E #8E1F71 #8E741F #1F8E3D

split-complementary

#1F398E #8E3D1F #718E1F

monochromatic

#09112A #14255C #1F398E #2A4DC0 #4F6FD9

Accessibility & contrast

On white

10.32

#1F398E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1F398E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F398E

10.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F398E	#FFFFFF	#000000	##FFFFFF
##1F398E	1.00	10.32	2.03	10.32
#FFFFFF	10.32	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004691

Deuteranopia (green-blind)

#003B8C

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f398e;
/* rgb */ color: rgb(31, 57, 142);
/* oklch */ color: oklch(38.1% 0.144 266.4);

Tailwind

colors: {
  custom: {
    50: '#6d6fb0',
    500: '#1f398e',
    950: '#000000',
  },
}

SCSS

$custom: #1f398e;
$custom-light: #6d6fb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f398e",
  "rgb": {
    "r": 31,
    "g": 57,
    "b": 142
  },
  "hsl": {
    "h": 225.946,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.38091,
    "c": 0.14444,
    "h": 266.4
  },
  "luminance": 0.05171
}

Semantic roles & 50–950 ramp

primary

#1F398E

secondary

#BBA24D

accent

#C041E7

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1F398E

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

Preview Lab → · Contrast checker → · Palette generator →