#1F398F#1F398F

#1F398F is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.146 H 266.5°. Best body text is #FFFFFF at 10.29:1 contrast (WCAG AA passes).

Color values

HEX	#1F398F
RGB	rgb(31, 57, 143)
HSL	hsl(226, 64%, 34%)
HSV	hsv(226, 78%, 56%)
CMYK	cmyk(78.3%, 60.1%, 0%, 43.9%)
CIE-LAB	lab(27.30, 22.80, -50.40)
CIE-LCH	lch(27.30, 55.32, 294.34°)
OKLab	oklab(38.18% -0.0089 -0.1456)
OKLCH	oklch(38.18% 0.146 266.5)
XYZ	xyz(6.9844, 5.1999, 26.6169)
Luminance	0.0520 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F398F #8F751F

analogous

#1F718F #1F398F #3D1F8F

triadic

#1F398F #8F1F39 #398F1F

tetradic

#1F398F #8F1F71 #8F751F #1F8F3D

square

#1F398F #8F1F71 #8F751F #1F8F3D

split-complementary

#1F398F #8F3D1F #718F1F

monochromatic

#09112A #14255D #1F398F #2A4DC1 #4F6FD9

Accessibility & contrast

On white

10.29

#1F398F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#1F398F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F398F

10.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F398F	#FFFFFF	#000000	##FFFFFF
##1F398F	1.00	10.29	2.04	10.29
#FFFFFF	10.29	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004692

Deuteranopia (green-blind)

#003B8D

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f398f;
/* rgb */ color: rgb(31, 57, 143);
/* oklch */ color: oklch(38.2% 0.146 266.5);

Tailwind

colors: {
  custom: {
    50: '#6d6fb1',
    500: '#1f398f',
    950: '#000000',
  },
}

SCSS

$custom: #1f398f;
$custom-light: #6d6fb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f398f",
  "rgb": {
    "r": 31,
    "g": 57,
    "b": 143
  },
  "hsl": {
    "h": 226.071,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.3818,
    "c": 0.14584,
    "h": 266.5
  },
  "luminance": 0.05201
}

Semantic roles & 50–950 ramp

primary

#1F398F

secondary

#BCA24E

accent

#C140E7

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F398F

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

Preview Lab → · Contrast checker → · Palette generator →