#1F2974#1F2974

#1F2974 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.5% C 0.128 H 271.4°. Best body text is #FFFFFF at 12.90:1 contrast (WCAG AA passes).

Color values

HEX	#1F2974
RGB	rgb(31, 41, 116)
HSL	hsl(233, 58%, 29%)
HSV	hsv(233, 73%, 45%)
CMYK	cmyk(73.3%, 64.7%, 0%, 54.5%)
CIE-LAB	lab(20.59, 23.30, -44.38)
CIE-LCH	lch(20.59, 50.12, 297.71°)
OKLab	oklab(32.46% 0.0031 -0.1281)
OKLCH	oklch(32.46% 0.128 271.4)
XYZ	xyz(4.5093, 3.1377, 16.8876)
Luminance	0.0314 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2974 #746A1F

analogous

#1F5474 #1F2974 #401F74

triadic

#1F2974 #741F29 #29741F

tetradic

#1F2974 #741F54 #746A1F #1F7440

square

#1F2974 #741F54 #746A1F #1F7440

split-complementary

#1F2974 #74401F #54741F

monochromatic

#060918 #121844 #1F2974 #2C3AA4 #4152CC

Accessibility & contrast

On white

12.90

#1F2974 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1F2974 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2974

12.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2974	#FFFFFF	#000000	##FFFFFF
##1F2974	1.00	12.90	1.63	12.90
#FFFFFF	12.90	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003676

Deuteranopia (green-blind)

#002E73

Tritanopia (blue-blind)

#003C4A

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f2974;
/* rgb */ color: rgb(31, 41, 116);
/* oklch */ color: oklch(32.5% 0.128 271.4);

Tailwind

colors: {
  custom: {
    50: '#68629d',
    500: '#1f2974',
    950: '#000000',
  },
}

SCSS

$custom: #1f2974;
$custom-light: #68629d;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2974",
  "rgb": {
    "r": 31,
    "g": 41,
    "b": 116
  },
  "hsl": {
    "h": 232.941,
    "s": 57.823,
    "l": 28.824
  },
  "oklch": {
    "l": 0.32463,
    "c": 0.12812,
    "h": 271.4
  },
  "luminance": 0.03138
}

Semantic roles & 50–950 ramp

primary

#1F2974

secondary

#A89C47

accent

#CF47E1

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1F2974

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

Preview Lab → · Contrast checker → · Palette generator →