#1F3874#1F3874

#1F3874 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.7% C 0.108 H 264.5°. Best body text is #FFFFFF at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#1F3874
RGB	rgb(31, 56, 116)
HSL	hsl(222, 58%, 29%)
HSV	hsv(222, 73%, 45%)
CMYK	cmyk(73.3%, 51.7%, 0%, 54.5%)
CIE-LAB	lab(24.89, 12.71, -37.39)
CIE-LCH	lch(24.89, 39.50, 288.78°)
OKLab	oklab(35.69% -0.0103 -0.1073)
OKLCH	oklch(35.69% 0.108 264.5)
XYZ	xyz(5.1305, 4.3801, 17.0947)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3874 #745B1F

analogous

#1F6374 #1F3874 #311F74

triadic

#1F3874 #741F38 #38741F

tetradic

#1F3874 #741F63 #745B1F #1F7431

square

#1F3874 #741F63 #745B1F #1F7431

split-complementary

#1F3874 #74311F #63741F

monochromatic

#060C18 #122144 #1F3874 #2C4FA4 #416ACC

Accessibility & contrast

On white

11.19

#1F3874 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1F3874 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3874

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3874	#FFFFFF	#000000	##FFFFFF
##1F3874	1.00	11.19	1.88	11.19
#FFFFFF	11.19	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#163F76

Deuteranopia (green-blind)

#003773

Tritanopia (blue-blind)

#004650

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f3874;
/* rgb */ color: rgb(31, 56, 116);
/* oklch */ color: oklch(35.7% 0.108 264.5);

Tailwind

colors: {
  custom: {
    50: '#666e9c',
    500: '#1f3874',
    950: '#000000',
  },
}

SCSS

$custom: #1f3874;
$custom-light: #666e9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3874",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 116
  },
  "hsl": {
    "h": 222.353,
    "s": 57.823,
    "l": 28.824
  },
  "oklch": {
    "l": 0.35694,
    "c": 0.10782,
    "h": 264.5
  },
  "luminance": 0.04381
}

Semantic roles & 50–950 ramp

primary

#1F3874

secondary

#A88B47

accent

#B447E1

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1F3874

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

Preview Lab → · Contrast checker → · Palette generator →