#1F2F72#1F2F72

#1F2F72 is a dark, moderate blue. Relative luminance 0.035; OKLCH L 33.5% C 0.117 H 269.0°. Best body text is #FFFFFF at 12.30:1 contrast (WCAG AA passes).

Color values

HEX	#1F2F72
RGB	rgb(31, 47, 114)
HSL	hsl(228, 57%, 28%)
HSV	hsv(228, 73%, 45%)
CMYK	cmyk(72.8%, 58.8%, 0%, 55.3%)
CIE-LAB	lab(22.08, 18.29, -40.65)
CIE-LCH	lch(22.08, 44.58, 294.22°)
OKLab	oklab(33.52% -0.002 -0.1171)
OKLCH	oklch(33.52% 0.117 269)
XYZ	xyz(4.6178, 3.5388, 16.3560)
Luminance	0.0354 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2F72 #72621F

analogous

#1F5872 #1F2F72 #381F72

triadic

#1F2F72 #721F2F #2F721F

tetradic

#1F2F72 #721F58 #72621F #1F7238

square

#1F2F72 #721F58 #72621F #1F7238

split-complementary

#1F2F72 #72381F #58721F

monochromatic

#070A18 #121B42 #1F2F72 #2C43A2 #405BCB

Accessibility & contrast

On white

12.30

#1F2F72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1F2F72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2F72

12.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2F72	#FFFFFF	#000000	##FFFFFF
##1F2F72	1.00	12.30	1.71	12.30
#FFFFFF	12.30	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003974

Deuteranopia (green-blind)

#003171

Tritanopia (blue-blind)

#003F4B

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f2f72;
/* rgb */ color: rgb(31, 47, 114);
/* oklch */ color: oklch(33.5% 0.117 269.0);

Tailwind

colors: {
  custom: {
    50: '#67679b',
    500: '#1f2f72',
    950: '#000000',
  },
}

SCSS

$custom: #1f2f72;
$custom-light: #67679b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2f72",
  "rgb": {
    "r": 31,
    "g": 47,
    "b": 114
  },
  "hsl": {
    "h": 228.434,
    "s": 57.241,
    "l": 28.431
  },
  "oklch": {
    "l": 0.33523,
    "c": 0.11709,
    "h": 269
  },
  "luminance": 0.03539
}

Semantic roles & 50–950 ramp

primary

#1F2F72

secondary

#A69447

accent

#C347E0

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060E

muted

#7A7A7E

Preview Lab

Preview with #1F2F72

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

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