#1F2B73#1F2B73

#1F2B73 is a dark, vivid blue. Relative luminance 0.033; OKLCH L 32.8% C 0.124 H 270.7°. Best body text is #FFFFFF at 12.72:1 contrast (WCAG AA passes).

Color values

HEX	#1F2B73
RGB	rgb(31, 43, 115)
HSL	hsl(231, 58%, 29%)
HSV	hsv(231, 73%, 45%)
CMYK	cmyk(73%, 62.6%, 0%, 54.9%)
CIE-LAB	lab(21.04, 21.51, -42.99)
CIE-LCH	lch(21.04, 48.07, 296.59°)
OKLab	oklab(32.77% 0.0015 -0.124)
OKLCH	oklch(32.77% 0.124 270.7)
XYZ	xyz(4.5224, 3.2564, 16.6065)
Luminance	0.0326 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2B73 #73671F

analogous

#1F5573 #1F2B73 #3D1F73

triadic

#1F2B73 #731F2B #2B731F

tetradic

#1F2B73 #731F55 #73671F #1F733D

square

#1F2B73 #731F55 #73671F #1F733D

split-complementary

#1F2B73 #733D1F #55731F

monochromatic

#060918 #121943 #1F2B73 #2C3DA3 #4155CC

Accessibility & contrast

On white

12.72

#1F2B73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1F2B73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2B73

12.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2B73	#FFFFFF	#000000	##FFFFFF
##1F2B73	1.00	12.72	1.65	12.72
#FFFFFF	12.72	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003775

Deuteranopia (green-blind)

#002F72

Tritanopia (blue-blind)

#003D4A

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f2b73;
/* rgb */ color: rgb(31, 43, 115);
/* oklch */ color: oklch(32.8% 0.124 270.7);

Tailwind

colors: {
  custom: {
    50: '#67649c',
    500: '#1f2b73',
    950: '#000000',
  },
}

SCSS

$custom: #1f2b73;
$custom-light: #67649c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2b73",
  "rgb": {
    "r": 31,
    "g": 43,
    "b": 115
  },
  "hsl": {
    "h": 231.429,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.32773,
    "c": 0.124,
    "h": 270.7
  },
  "luminance": 0.03257
}

Semantic roles & 50–950 ramp

primary

#1F2B73

secondary

#A79947

accent

#CB47E1

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1F2B73

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

Preview Lab → · Contrast checker → · Palette generator →