#1F3790#1F3790

#1F3790 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.9% C 0.150 H 267.1°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#1F3790
RGB	rgb(31, 55, 144)
HSL	hsl(227, 65%, 34%)
HSV	hsv(227, 78%, 56%)
CMYK	cmyk(78.5%, 61.8%, 0%, 43.5%)
CIE-LAB	lab(26.84, 24.57, -51.77)
CIE-LCH	lch(26.84, 57.30, 295.39°)
OKLab	oklab(37.87% -0.0075 -0.1496)
OKLCH	oklch(37.87% 0.15 267.1)
XYZ	xyz(6.9635, 5.0365, 26.9853)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3790 #90781F

analogous

#1F7090 #1F3790 #401F90

triadic

#1F3790 #901F37 #37901F

tetradic

#1F3790 #901F70 #90781F #1F9040

square

#1F3790 #901F70 #90781F #1F9040

split-complementary

#1F3790 #90401F #70901F

monochromatic

#09112B #14245E #1F3790 #2A4AC2 #506DD9

Accessibility & contrast

On white

10.46

#1F3790 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1F3790 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3790

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3790	#FFFFFF	#000000	##FFFFFF
##1F3790	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004593

Deuteranopia (green-blind)

#003A8E

Tritanopia (blue-blind)

#004E5E

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f3790;
/* rgb */ color: rgb(31, 55, 144);
/* oklch */ color: oklch(37.9% 0.150 267.1);

Tailwind

colors: {
  custom: {
    50: '#6e6db1',
    500: '#1f3790',
    950: '#000000',
  },
}

SCSS

$custom: #1f3790;
$custom-light: #6e6db1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3790",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 144
  },
  "hsl": {
    "h": 227.257,
    "s": 64.571,
    "l": 34.314
  },
  "oklch": {
    "l": 0.37865,
    "c": 0.14979,
    "h": 267.1
  },
  "luminance": 0.05037
}

Semantic roles & 50–950 ramp

primary

#1F3790

secondary

#BCA54E

accent

#C440E8

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F3790

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

Preview Lab → · Contrast checker → · Palette generator →