#1F3073#1F3073

#1F3073 is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.8% C 0.117 H 268.6°. Best body text is #FFFFFF at 12.15:1 contrast (WCAG AA passes).

Color values

HEX	#1F3073
RGB	rgb(31, 48, 115)
HSL	hsl(228, 58%, 29%)
HSV	hsv(228, 73%, 45%)
CMYK	cmyk(73%, 58.3%, 0%, 54.9%)
CIE-LAB	lab(22.45, 17.98, -40.70)
CIE-LCH	lch(22.45, 44.49, 293.84°)
OKLab	oklab(33.83% -0.0029 -0.1172)
OKLCH	oklch(33.83% 0.117 268.6)
XYZ	xyz(4.7155, 3.6425, 16.6709)
Luminance	0.0364 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3073 #73621F

analogous

#1F5A73 #1F3073 #381F73

triadic

#1F3073 #731F30 #30731F

tetradic

#1F3073 #731F5A #73621F #1F7338

square

#1F3073 #731F5A #73621F #1F7338

split-complementary

#1F3073 #73381F #5A731F

monochromatic

#060A18 #121C43 #1F3073 #2C44A3 #415DCC

Accessibility & contrast

On white

12.15

#1F3073 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1F3073 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3073

12.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3073	#FFFFFF	#000000	##FFFFFF
##1F3073	1.00	12.15	1.73	12.15
#FFFFFF	12.15	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A75

Deuteranopia (green-blind)

#003272

Tritanopia (blue-blind)

#00404C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1f3073;
/* rgb */ color: rgb(31, 48, 115);
/* oklch */ color: oklch(33.8% 0.117 268.6);

Tailwind

colors: {
  custom: {
    50: '#67689c',
    500: '#1f3073',
    950: '#000000',
  },
}

SCSS

$custom: #1f3073;
$custom-light: #67689c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3073",
  "rgb": {
    "r": 31,
    "g": 48,
    "b": 115
  },
  "hsl": {
    "h": 227.857,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.33825,
    "c": 0.11722,
    "h": 268.6
  },
  "luminance": 0.03643
}

Semantic roles & 50–950 ramp

primary

#1F3073

secondary

#A79347

accent

#C247E1

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060E

muted

#7A7A7E

Preview Lab

Preview with #1F3073

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

Preview Lab → · Contrast checker → · Palette generator →