#1F2B70#1F2B70

#1F2B70 is a dark, moderate blue. Relative luminance 0.032; OKLCH L 32.5% C 0.120 H 270.7°. Best body text is #FFFFFF at 12.82:1 contrast (WCAG AA passes).

Color values

HEX	#1F2B70
RGB	rgb(31, 43, 112)
HSL	hsl(231, 57%, 28%)
HSV	hsv(231, 72%, 44%)
CMYK	cmyk(72.3%, 61.6%, 0%, 56.1%)
CIE-LAB	lab(20.78, 20.34, -41.48)
CIE-LCH	lch(20.78, 46.20, 296.11°)
OKLab	oklab(32.5% 0.0015 -0.1196)
OKLCH	oklch(32.5% 0.12 270.7)
XYZ	xyz(4.3526, 3.1885, 15.7121)
Luminance	0.0319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2B70 #70641F

analogous

#1F5370 #1F2B70 #3B1F70

triadic

#1F2B70 #701F2B #2B701F

tetradic

#1F2B70 #701F53 #70641F #1F703B

square

#1F2B70 #701F53 #70641F #1F703B

split-complementary

#1F2B70 #703B1F #53701F

monochromatic

#070918 #121940 #1F2B70 #2C3DA0 #3F54CA

Accessibility & contrast

On white

12.82

#1F2B70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1F2B70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2B70

12.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2B70	#FFFFFF	#000000	##FFFFFF
##1F2B70	1.00	12.82	1.64	12.82
#FFFFFF	12.82	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003672

Deuteranopia (green-blind)

#002E6F

Tritanopia (blue-blind)

#003C49

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f2b70;
/* rgb */ color: rgb(31, 43, 112);
/* oklch */ color: oklch(32.5% 0.120 270.7);

Tailwind

colors: {
  custom: {
    50: '#66649a',
    500: '#1f2b70',
    950: '#000000',
  },
}

SCSS

$custom: #1f2b70;
$custom-light: #66649a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2b70",
  "rgb": {
    "r": 31,
    "g": 43,
    "b": 112
  },
  "hsl": {
    "h": 231.111,
    "s": 56.643,
    "l": 28.039
  },
  "oklch": {
    "l": 0.32499,
    "c": 0.11958,
    "h": 270.7
  },
  "luminance": 0.03189
}

Semantic roles & 50–950 ramp

primary

#1F2B70

secondary

#A49647

accent

#C948E0

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #1F2B70

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

Preview Lab → · Contrast checker → · Palette generator →