#1F397D#1F397D

#1F397D is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.6% C 0.120 H 265.2°. Best body text is #FFFFFF at 10.83:1 contrast (WCAG AA passes).

Color values

HEX	#1F397D
RGB	rgb(31, 57, 125)
HSL	hsl(223, 60%, 31%)
HSV	hsv(223, 75%, 49%)
CMYK	cmyk(75.2%, 54.4%, 0%, 51%)
CIE-LAB	lab(25.86, 15.63, -41.53)
CIE-LCH	lch(25.86, 44.37, 290.62°)
OKLab	oklab(36.64% -0.0101 -0.1195)
OKLCH	oklch(36.64% 0.12 265.2)
XYZ	xyz(5.7286, 4.6976, 20.0029)
Luminance	0.0470 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F397D #7D631F

analogous

#1F687D #1F397D #341F7D

triadic

#1F397D #7D1F39 #397D1F

tetradic

#1F397D #7D1F68 #7D631F #1F7D34

square

#1F397D #7D1F68 #7D631F #1F7D34

split-complementary

#1F397D #7D341F #687D1F

monochromatic

#070C1B #13234C #1F397D #2B4FAE #456CD1

Accessibility & contrast

On white

10.83

#1F397D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1F397D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F397D

10.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F397D	#FFFFFF	#000000	##FFFFFF
##1F397D	1.00	10.83	1.94	10.83
#FFFFFF	10.83	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A427F

Deuteranopia (green-blind)

#00397C

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f397d;
/* rgb */ color: rgb(31, 57, 125);
/* oklch */ color: oklch(36.6% 0.120 265.2);

Tailwind

colors: {
  custom: {
    50: '#696ea3',
    500: '#1f397d',
    950: '#000000',
  },
}

SCSS

$custom: #1f397d;
$custom-light: #696ea3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f397d",
  "rgb": {
    "r": 31,
    "g": 57,
    "b": 125
  },
  "hsl": {
    "h": 223.404,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36641,
    "c": 0.11991,
    "h": 265.2
  },
  "luminance": 0.04698
}

Semantic roles & 50–950 ramp

primary

#1F397D

secondary

#B09348

accent

#B744E3

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F397D

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

Preview Lab → · Contrast checker → · Palette generator →