#1F375A#1F375A

#1F375A is a dark, moderate blue. Relative luminance 0.038; OKLCH L 33.6% C 0.069 H 257.8°. Best body text is #FFFFFF at 11.98:1 contrast (WCAG AA passes).

Color values

HEX	#1F375A
RGB	rgb(31, 55, 90)
HSL	hsl(216, 49%, 24%)
HSV	hsv(216, 66%, 35%)
CMYK	cmyk(65.6%, 38.9%, 0%, 64.7%)
CIE-LAB	lab(22.87, 3.08, -23.82)
CIE-LCH	lch(22.87, 24.01, 277.37°)
OKLab	oklab(33.58% -0.0146 -0.0675)
OKLCH	oklch(33.58% 0.069 257.8)
XYZ	xyz(3.7761, 3.7615, 10.1979)
Luminance	0.0376 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F375A #5A421F

analogous

#1F545A #1F375A #241F5A

triadic

#1F375A #5A1F37 #375A1F

tetradic

#1F375A #5A1F54 #5A421F #1F5A24

square

#1F375A #5A1F54 #5A421F #1F5A24

split-complementary

#1F375A #5A241F #545A1F

monochromatic

#080E17 #0F1B2C #1F375A #2F5388 #3E6FB5

Accessibility & contrast

On white

11.98

#1F375A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1F375A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F375A

11.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F375A	#FFFFFF	#000000	##FFFFFF
##1F375A	1.00	11.98	1.75	11.98
#FFFFFF	11.98	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	11.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#283A5B

Deuteranopia (green-blind)

#203459

Tritanopia (blue-blind)

#003F44

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f375a;
/* rgb */ color: rgb(31, 55, 90);
/* oklch */ color: oklch(33.6% 0.069 257.8);

Tailwind

colors: {
  custom: {
    50: '#616d89',
    500: '#1f375a',
    950: '#000000',
  },
}

SCSS

$custom: #1f375a;
$custom-light: #616d89;
$custom-dark: #000000;

JSON

{
  "hex": "#1f375a",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 90
  },
  "hsl": {
    "h": 215.593,
    "s": 48.76,
    "l": 23.725
  },
  "oklch": {
    "l": 0.33583,
    "c": 0.06905,
    "h": 257.8
  },
  "luminance": 0.03762
}

Semantic roles & 50–950 ramp

primary

#1F375A

secondary

#8F7146

accent

#A14FD8

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05070B

muted

#797A7C

Preview Lab

Preview with #1F375A

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

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