#1F375B#1F375B

#1F375B is a dark, moderate blue. Relative luminance 0.038; OKLCH L 33.6% C 0.071 H 258.3°. Best body text is #FFFFFF at 11.96:1 contrast (WCAG AA passes).

Color values

HEX	#1F375B
RGB	rgb(31, 55, 91)
HSL	hsl(216, 49%, 24%)
HSV	hsv(216, 66%, 36%)
CMYK	cmyk(65.9%, 39.6%, 0%, 64.3%)
CIE-LAB	lab(22.93, 3.47, -24.38)
CIE-LCH	lch(22.93, 24.62, 278.10°)
OKLab	oklab(33.65% -0.0143 -0.0691)
OKLCH	oklch(33.65% 0.071 258.3)
XYZ	xyz(3.8189, 3.7787, 10.4236)
Luminance	0.0378 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F375B #5B431F

analogous

#1F555B #1F375B #251F5B

triadic

#1F375B #5B1F37 #375B1F

tetradic

#1F375B #5B1F55 #5B431F #1F5B25

square

#1F375B #5B1F55 #5B431F #1F5B25

split-complementary

#1F375B #5B251F #555B1F

monochromatic

#080E17 #0F1B2D #1F375B #2F5389 #3E6EB6

Accessibility & contrast

On white

11.96

#1F375B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1F375B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F375B

11.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F375B	#FFFFFF	#000000	##FFFFFF
##1F375B	1.00	11.96	1.76	11.96
#FFFFFF	11.96	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#283A5C

Deuteranopia (green-blind)

#1F345A

Tritanopia (blue-blind)

#003F44

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f375b;
/* rgb */ color: rgb(31, 55, 91);
/* oklch */ color: oklch(33.6% 0.071 258.3);

Tailwind

colors: {
  custom: {
    50: '#616d89',
    500: '#1f375b',
    950: '#000000',
  },
}

SCSS

$custom: #1f375b;
$custom-light: #616d89;
$custom-dark: #000000;

JSON

{
  "hex": "#1f375b",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 91
  },
  "hsl": {
    "h": 216,
    "s": 49.18,
    "l": 23.922
  },
  "oklch": {
    "l": 0.33648,
    "c": 0.0706,
    "h": 258.3
  },
  "luminance": 0.03779
}

Semantic roles & 50–950 ramp

primary

#1F375B

secondary

#907246

accent

#A24FD9

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05070B

muted

#797A7C

Preview Lab

Preview with #1F375B

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

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