#1F3D9A#1F3D9A

#1F3D9A is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.0% C 0.156 H 265.8°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D9A
RGB	rgb(31, 61, 154)
HSL	hsl(225, 66%, 36%)
HSV	hsv(225, 80%, 60%)
CMYK	cmyk(79.9%, 60.4%, 0%, 39.6%)
CIE-LAB	lab(29.31, 24.39, -53.86)
CIE-LCH	lch(29.31, 59.12, 294.37°)
OKLab	oklab(39.98% -0.0114 -0.1556)
OKLCH	oklch(39.98% 0.156 265.8)
XYZ	xyz(8.0645, 5.9610, 31.2911)
Luminance	0.0596 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D9A #9A7C1F

analogous

#1F7B9A #1F3D9A #3F1F9A

triadic

#1F3D9A #9A1F3D #3D9A1F

tetradic

#1F3D9A #9A1F7B #9A7C1F #1F9A3F

square

#1F3D9A #9A1F7B #9A7C1F #1F9A3F

split-complementary

#1F3D9A #9A3F1F #7B9A1F

monochromatic

#0A1534 #152967 #1F3D9A #2951CD #5677DD

Accessibility & contrast

On white

9.58

#1F3D9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#1F3D9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D9A

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D9A	#FFFFFF	#000000	##FFFFFF
##1F3D9A	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9D

Deuteranopia (green-blind)

#004098

Tritanopia (blue-blind)

#005565

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f3d9a;
/* rgb */ color: rgb(31, 61, 154);
/* oklch */ color: oklch(40.0% 0.156 265.8);

Tailwind

colors: {
  custom: {
    50: '#7072b9',
    500: '#1f3d9a',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d9a;
$custom-light: #7072b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d9a",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 154
  },
  "hsl": {
    "h": 225.366,
    "s": 66.486,
    "l": 36.275
  },
  "oklch": {
    "l": 0.39975,
    "c": 0.15606,
    "h": 265.8
  },
  "luminance": 0.05962
}

Semantic roles & 50–950 ramp

primary

#1F3D9A

secondary

#C1A654

accent

#C03EE9

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1F3D9A

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

Preview Lab → · Contrast checker → · Palette generator →