#1F2F71#1F2F71

#1F2F71 is a dark, moderate blue. Relative luminance 0.035; OKLCH L 33.4% C 0.116 H 269.0°. Best body text is #FFFFFF at 12.33:1 contrast (WCAG AA passes).

Color values

HEX	#1F2F71
RGB	rgb(31, 47, 113)
HSL	hsl(228, 57%, 28%)
HSV	hsv(228, 73%, 44%)
CMYK	cmyk(72.6%, 58.4%, 0%, 55.7%)
CIE-LAB	lab(22.00, 17.89, -40.15)
CIE-LCH	lch(22.00, 43.95, 294.02°)
OKLab	oklab(33.44% -0.0021 -0.1156)
OKLCH	oklch(33.44% 0.116 269)
XYZ	xyz(4.5612, 3.5161, 16.0579)
Luminance	0.0352 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2F71 #71611F

analogous

#1F5871 #1F2F71 #381F71

triadic

#1F2F71 #711F2F #2F711F

tetradic

#1F2F71 #711F58 #71611F #1F7138

square

#1F2F71 #711F58 #71611F #1F7138

split-complementary

#1F2F71 #71381F #58711F

monochromatic

#070A18 #121B41 #1F2F71 #2C43A1 #405BCB

Accessibility & contrast

On white

12.33

#1F2F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1F2F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2F71

12.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2F71	#FFFFFF	#000000	##FFFFFF
##1F2F71	1.00	12.33	1.70	12.33
#FFFFFF	12.33	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003973

Deuteranopia (green-blind)

#003170

Tritanopia (blue-blind)

#003F4B

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f2f71;
/* rgb */ color: rgb(31, 47, 113);
/* oklch */ color: oklch(33.4% 0.116 269.0);

Tailwind

colors: {
  custom: {
    50: '#66679a',
    500: '#1f2f71',
    950: '#000000',
  },
}

SCSS

$custom: #1f2f71;
$custom-light: #66679a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2f71",
  "rgb": {
    "r": 31,
    "g": 47,
    "b": 113
  },
  "hsl": {
    "h": 228.293,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.33436,
    "c": 0.1156,
    "h": 269
  },
  "luminance": 0.03517
}

Semantic roles & 50–950 ramp

primary

#1F2F71

secondary

#A59347

accent

#C248E0

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1F2F71

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

Preview Lab → · Contrast checker → · Palette generator →