#1F2B71#1F2B71

#1F2B71 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.6% C 0.121 H 270.7°. Best body text is #FFFFFF at 12.79:1 contrast (WCAG AA passes).

Color values

HEX	#1F2B71
RGB	rgb(31, 43, 113)
HSL	hsl(231, 57%, 28%)
HSV	hsv(231, 73%, 44%)
CMYK	cmyk(72.6%, 61.9%, 0%, 55.7%)
CIE-LAB	lab(20.87, 20.73, -41.99)
CIE-LCH	lch(20.87, 46.83, 296.27°)
OKLab	oklab(32.59% 0.0015 -0.121)
OKLCH	oklch(32.59% 0.121 270.7)
XYZ	xyz(4.4086, 3.2109, 16.0070)
Luminance	0.0321 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2B71 #71651F

analogous

#1F5471 #1F2B71 #3C1F71

triadic

#1F2B71 #711F2B #2B711F

tetradic

#1F2B71 #711F54 #71651F #1F713C

square

#1F2B71 #711F54 #71651F #1F713C

split-complementary

#1F2B71 #713C1F #54711F

monochromatic

#070918 #121941 #1F2B71 #2C3DA1 #4054CB

Accessibility & contrast

On white

12.79

#1F2B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1F2B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2B71

12.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2B71	#FFFFFF	#000000	##FFFFFF
##1F2B71	1.00	12.79	1.64	12.79
#FFFFFF	12.79	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003673

Deuteranopia (green-blind)

#002F70

Tritanopia (blue-blind)

#003C49

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f2b71;
/* rgb */ color: rgb(31, 43, 113);
/* oklch */ color: oklch(32.6% 0.121 270.7);

Tailwind

colors: {
  custom: {
    50: '#67649a',
    500: '#1f2b71',
    950: '#000000',
  },
}

SCSS

$custom: #1f2b71;
$custom-light: #67649a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2b71",
  "rgb": {
    "r": 31,
    "g": 43,
    "b": 113
  },
  "hsl": {
    "h": 231.22,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.3259,
    "c": 0.12106,
    "h": 270.7
  },
  "luminance": 0.03211
}

Semantic roles & 50–950 ramp

primary

#1F2B71

secondary

#A59747

accent

#CA48E0

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1F2B71

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

Preview Lab → · Contrast checker → · Palette generator →