#1F375C#1F375C

#1F375C is a dark, moderate blue. Relative luminance 0.038; OKLCH L 33.7% C 0.072 H 258.8°. Best body text is #FFFFFF at 11.94:1 contrast (WCAG AA passes).

Color values

HEX	#1F375C
RGB	rgb(31, 55, 92)
HSL	hsl(216, 50%, 24%)
HSV	hsv(216, 66%, 36%)
CMYK	cmyk(66.3%, 40.2%, 0%, 63.9%)
CIE-LAB	lab(22.99, 3.86, -24.94)
CIE-LCH	lch(22.99, 25.24, 278.80°)
OKLab	oklab(33.71% -0.014 -0.0708)
OKLCH	oklch(33.71% 0.072 258.8)
XYZ	xyz(3.8623, 3.7960, 10.6523)
Luminance	0.0380 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F375C #5C441F

analogous

#1F565C #1F375C #261F5C

triadic

#1F375C #5C1F37 #375C1F

tetradic

#1F375C #5C1F56 #5C441F #1F5C26

square

#1F375C #5C1F56 #5C441F #1F5C26

split-complementary

#1F375C #5C261F #565C1F

monochromatic

#080E17 #101C2E #1F375C #2E528A #3E6EB8

Accessibility & contrast

On white

11.94

#1F375C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1F375C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F375C

11.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F375C	#FFFFFF	#000000	##FFFFFF
##1F375C	1.00	11.94	1.76	11.94
#FFFFFF	11.94	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#273A5E

Deuteranopia (green-blind)

#1F345B

Tritanopia (blue-blind)

#003F45

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f375c;
/* rgb */ color: rgb(31, 55, 92);
/* oklch */ color: oklch(33.7% 0.072 258.8);

Tailwind

colors: {
  custom: {
    50: '#616d8a',
    500: '#1f375c',
    950: '#000000',
  },
}

SCSS

$custom: #1f375c;
$custom-light: #616d8a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f375c",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 92
  },
  "hsl": {
    "h": 216.393,
    "s": 49.593,
    "l": 24.118
  },
  "oklch": {
    "l": 0.33714,
    "c": 0.07215,
    "h": 258.8
  },
  "luminance": 0.03796
}

Semantic roles & 50–950 ramp

primary

#1F375C

secondary

#917346

accent

#A34FD9

background

#F6F6F8

surface

#EBEBF0

border

#C6C6CB

text

#05070C

muted

#7A7A7D

Preview Lab

Preview with #1F375C

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

Preview Lab → · Contrast checker → · Palette generator →