#1F3390#1F3390

#1F3390 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.1% C 0.155 H 268.2°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#1F3390
RGB	rgb(31, 51, 144)
HSL	hsl(229, 65%, 34%)
HSV	hsv(229, 78%, 56%)
CMYK	cmyk(78.5%, 64.6%, 0%, 43.5%)
CIE-LAB	lab(25.78, 27.30, -53.50)
CIE-LCH	lch(25.78, 60.06, 297.03°)
OKLab	oklab(37.08% -0.0049 -0.1547)
OKLCH	oklch(37.08% 0.155 268.2)
XYZ	xyz(6.7812, 4.6718, 26.9245)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3390 #907C1F

analogous

#1F6B90 #1F3390 #441F90

triadic

#1F3390 #901F33 #33901F

tetradic

#1F3390 #901F6B #907C1F #1F9044

square

#1F3390 #901F6B #907C1F #1F9044

split-complementary

#1F3390 #90441F #6B901F

monochromatic

#090F2B #14215E #1F3390 #2A45C2 #5068D9

Accessibility & contrast

On white

10.85

#1F3390 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F3390 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3390

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3390	#FFFFFF	#000000	##FFFFFF
##1F3390	1.00	10.85	1.93	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004293

Deuteranopia (green-blind)

#00388E

Tritanopia (blue-blind)

#004B5C

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f3390;
/* rgb */ color: rgb(31, 51, 144);
/* oklch */ color: oklch(37.1% 0.155 268.2);

Tailwind

colors: {
  custom: {
    50: '#6e6ab1',
    500: '#1f3390',
    950: '#000000',
  },
}

SCSS

$custom: #1f3390;
$custom-light: #6e6ab1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3390",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 144
  },
  "hsl": {
    "h": 229.381,
    "s": 64.571,
    "l": 34.314
  },
  "oklch": {
    "l": 0.3708,
    "c": 0.15481,
    "h": 268.2
  },
  "luminance": 0.04673
}

Semantic roles & 50–950 ramp

primary

#1F3390

secondary

#BCA94E

accent

#CA40E8

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1F3390

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

Preview Lab → · Contrast checker → · Palette generator →