#1F3994#1F3994

#1F3994 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.153 H 266.7°. Best body text is #FFFFFF at 10.14:1 contrast (WCAG AA passes).

Color values

HEX	#1F3994
RGB	rgb(31, 57, 148)
HSL	hsl(227, 65%, 35%)
HSV	hsv(227, 79%, 58%)
CMYK	cmyk(79.1%, 61.5%, 0%, 42%)
CIE-LAB	lab(27.72, 24.77, -52.79)
CIE-LCH	lch(27.72, 58.31, 295.14°)
OKLab	oklab(38.63% -0.0088 -0.1526)
OKLCH	oklch(38.63% 0.153 266.7)
XYZ	xyz(7.3716, 5.3548, 28.6563)
Luminance	0.0536 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3994 #947A1F

analogous

#1F7394 #1F3994 #401F94

triadic

#1F3994 #941F39 #39941F

tetradic

#1F3994 #941F73 #947A1F #1F9440

square

#1F3994 #941F73 #947A1F #1F9440

split-complementary

#1F3994 #94401F #73941F

monochromatic

#0A122F #142661 #1F3994 #2A4CC7 #5371DB

Accessibility & contrast

On white

10.14

#1F3994 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1F3994 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3994

10.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3994	#FFFFFF	#000000	##FFFFFF
##1F3994	1.00	10.14	2.07	10.14
#FFFFFF	10.14	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004797

Deuteranopia (green-blind)

#003C92

Tritanopia (blue-blind)

#005061

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1f3994;
/* rgb */ color: rgb(31, 57, 148);
/* oklch */ color: oklch(38.6% 0.153 266.7);

Tailwind

colors: {
  custom: {
    50: '#6e6fb4',
    500: '#1f3994',
    950: '#000000',
  },
}

SCSS

$custom: #1f3994;
$custom-light: #6e6fb4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3994",
  "rgb": {
    "r": 31,
    "g": 57,
    "b": 148
  },
  "hsl": {
    "h": 226.667,
    "s": 65.363,
    "l": 35.098
  },
  "oklch": {
    "l": 0.3863,
    "c": 0.15282,
    "h": 266.7
  },
  "luminance": 0.05356
}

Semantic roles & 50–950 ramp

primary

#1F3994

secondary

#BEA651

accent

#C33FE8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F3994

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

Preview Lab → · Contrast checker → · Palette generator →