#1F3374#1F3374

#1F3374 is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.6% C 0.115 H 267.2°. Best body text is #FFFFFF at 11.77:1 contrast (WCAG AA passes).

Color values

HEX	#1F3374
RGB	rgb(31, 51, 116)
HSL	hsl(226, 58%, 29%)
HSV	hsv(226, 73%, 45%)
CMYK	cmyk(73.3%, 56%, 0%, 54.5%)
CIE-LAB	lab(23.40, 16.25, -39.80)
CIE-LCH	lch(23.40, 42.99, 292.21°)
OKLab	oklab(34.57% -0.0055 -0.1145)
OKLCH	oklch(34.57% 0.115 267.2)
XYZ	xyz(4.9002, 3.9194, 17.0179)
Luminance	0.0392 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3374 #74601F

analogous

#1F5E74 #1F3374 #361F74

triadic

#1F3374 #741F33 #33741F

tetradic

#1F3374 #741F5E #74601F #1F7436

square

#1F3374 #741F5E #74601F #1F7436

split-complementary

#1F3374 #74361F #5E741F

monochromatic

#060B18 #121E44 #1F3374 #2C48A4 #4162CC

Accessibility & contrast

On white

11.77

#1F3374 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1F3374 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3374

11.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3374	#FFFFFF	#000000	##FFFFFF
##1F3374	1.00	11.77	1.78	11.77
#FFFFFF	11.77	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#043C76

Deuteranopia (green-blind)

#003473

Tritanopia (blue-blind)

#00434E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f3374;
/* rgb */ color: rgb(31, 51, 116);
/* oklch */ color: oklch(34.6% 0.115 267.2);

Tailwind

colors: {
  custom: {
    50: '#676a9d',
    500: '#1f3374',
    950: '#000000',
  },
}

SCSS

$custom: #1f3374;
$custom-light: #676a9d;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3374",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 116
  },
  "hsl": {
    "h": 225.882,
    "s": 57.823,
    "l": 28.824
  },
  "oklch": {
    "l": 0.34566,
    "c": 0.11461,
    "h": 267.2
  },
  "luminance": 0.0392
}

Semantic roles & 50–950 ramp

primary

#1F3374

secondary

#A89147

accent

#BD47E1

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060E

muted

#7A7A7E

Preview Lab

Preview with #1F3374

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

Preview Lab → · Contrast checker → · Palette generator →