#1F2671#1F2671

#1F2671 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.6% C 0.128 H 272.5°. Best body text is #FFFFFF at 13.34:1 contrast (WCAG AA passes).

Color values

HEX	#1F2671
RGB	rgb(31, 38, 113)
HSL	hsl(235, 57%, 28%)
HSV	hsv(235, 73%, 44%)
CMYK	cmyk(72.6%, 66.4%, 0%, 55.7%)
CIE-LAB	lab(19.51, 24.22, -44.20)
CIE-LCH	lch(19.51, 50.40, 298.73°)
OKLab	oklab(31.59% 0.0057 -0.1276)
OKLCH	oklch(31.59% 0.128 272.5)
XYZ	xyz(4.2378, 2.8694, 15.9501)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2671 #716A1F

analogous

#1F4F71 #1F2671 #411F71

triadic

#1F2671 #711F26 #26711F

tetradic

#1F2671 #711F4F #716A1F #1F7141

square

#1F2671 #711F4F #716A1F #1F7141

split-complementary

#1F2671 #71411F #4F711F

monochromatic

#070818 #121641 #1F2671 #2C36A1 #404CCB

Accessibility & contrast

On white

13.34

#1F2671 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1F2671 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2671

13.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2671	#FFFFFF	#000000	##FFFFFF
##1F2671	1.00	13.34	1.57	13.34
#FFFFFF	13.34	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003373

Deuteranopia (green-blind)

#002C70

Tritanopia (blue-blind)

#003947

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1f2671;
/* rgb */ color: rgb(31, 38, 113);
/* oklch */ color: oklch(31.6% 0.128 272.5);

Tailwind

colors: {
  custom: {
    50: '#67609b',
    500: '#1f2671',
    950: '#000000',
  },
}

SCSS

$custom: #1f2671;
$custom-light: #67609b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2671",
  "rgb": {
    "r": 31,
    "g": 38,
    "b": 113
  },
  "hsl": {
    "h": 234.878,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.31588,
    "c": 0.12772,
    "h": 272.5
  },
  "luminance": 0.0287
}

Semantic roles & 50–950 ramp

primary

#1F2671

secondary

#A59D47

accent

#D348E0

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1F2671

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

Preview Lab → · Contrast checker → · Palette generator →