#1F375E#1F375E

#1F375E is a dark, moderate blue. Relative luminance 0.038; OKLCH L 33.8% C 0.075 H 259.7°. Best body text is #FFFFFF at 11.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F375E
RGB	rgb(31, 55, 94)
HSL	hsl(217, 50%, 25%)
HSV	hsv(217, 67%, 37%)
CMYK	cmyk(67%, 41.5%, 0%, 63.1%)
CIE-LAB	lab(23.11, 4.64, -26.06)
CIE-LCH	lch(23.11, 26.47, 280.10°)
OKLab	oklab(33.85% -0.0135 -0.074)
OKLCH	oklch(33.85% 0.075 259.7)
XYZ	xyz(3.9509, 3.8315, 11.1188)
Luminance	0.0383 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F375E #5E461F

analogous

#1F575E #1F375E #271F5E

triadic

#1F375E #5E1F37 #375E1F

tetradic

#1F375E #5E1F57 #5E461F #1F5E27

square

#1F375E #5E1F57 #5E461F #1F5E27

split-complementary

#1F375E #5E271F #575E1F

monochromatic

#080D17 #101C30 #1F375E #2E528C #3D6DBA

Accessibility & contrast

On white

11.89

#1F375E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1F375E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F375E

11.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F375E	#FFFFFF	#000000	##FFFFFF
##1F375E	1.00	11.89	1.77	11.89
#FFFFFF	11.89	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#263A60

Deuteranopia (green-blind)

#1D345D

Tritanopia (blue-blind)

#004046

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f375e;
/* rgb */ color: rgb(31, 55, 94);
/* oklch */ color: oklch(33.8% 0.075 259.7);

Tailwind

colors: {
  custom: {
    50: '#626d8c',
    500: '#1f375e',
    950: '#000000',
  },
}

SCSS

$custom: #1f375e;
$custom-light: #626d8c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f375e",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 94
  },
  "hsl": {
    "h": 217.143,
    "s": 50.4,
    "l": 24.51
  },
  "oklch": {
    "l": 0.33847,
    "c": 0.07526,
    "h": 259.7
  },
  "luminance": 0.03832
}

Semantic roles & 50–950 ramp

primary

#1F375E

secondary

#937646

accent

#A54EDA

background

#F6F6F8

surface

#EBEBF0

border

#C6C6CB

text

#05070C

muted

#7A7A7D

Preview Lab

Preview with #1F375E

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

Preview Lab → · Contrast checker → · Palette generator →