#1F3574#1F3574

#1F3574 is a dark, moderate blue. Relative luminance 0.041; OKLCH L 35.0% C 0.112 H 266.2°. Best body text is #FFFFFF at 11.54:1 contrast (WCAG AA passes).

Color values

HEX	#1F3574
RGB	rgb(31, 53, 116)
HSL	hsl(224, 58%, 29%)
HSV	hsv(224, 73%, 45%)
CMYK	cmyk(73.3%, 54.3%, 0%, 54.5%)
CIE-LAB	lab(23.99, 14.83, -38.84)
CIE-LCH	lch(23.99, 41.58, 290.90°)
OKLab	oklab(35.01% -0.0074 -0.1116)
OKLCH	oklch(35.01% 0.112 266.2)
XYZ	xyz(4.9895, 4.0980, 17.0476)
Luminance	0.0410 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3574 #745E1F

analogous

#1F6074 #1F3574 #341F74

triadic

#1F3574 #741F35 #35741F

tetradic

#1F3574 #741F60 #745E1F #1F7434

square

#1F3574 #741F60 #745E1F #1F7434

split-complementary

#1F3574 #74341F #60741F

monochromatic

#060B18 #121F44 #1F3574 #2C4BA4 #4165CC

Accessibility & contrast

On white

11.54

#1F3574 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1F3574 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3574

11.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3574	#FFFFFF	#000000	##FFFFFF
##1F3574	1.00	11.54	1.82	11.54
#FFFFFF	11.54	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C3D76

Deuteranopia (green-blind)

#003573

Tritanopia (blue-blind)

#00444F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f3574;
/* rgb */ color: rgb(31, 53, 116);
/* oklch */ color: oklch(35.0% 0.112 266.2);

Tailwind

colors: {
  custom: {
    50: '#676b9c',
    500: '#1f3574',
    950: '#000000',
  },
}

SCSS

$custom: #1f3574;
$custom-light: #676b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3574",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 116
  },
  "hsl": {
    "h": 224.471,
    "s": 57.823,
    "l": 28.824
  },
  "oklch": {
    "l": 0.35012,
    "c": 0.11188,
    "h": 266.2
  },
  "luminance": 0.04098
}

Semantic roles & 50–950 ramp

primary

#1F3574

secondary

#A88F47

accent

#B947E1

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060E

muted

#7A7A7E

Preview Lab

Preview with #1F3574

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

Preview Lab → · Contrast checker → · Palette generator →