#1F409F#1F409F

#1F409F is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.0% C 0.159 H 265.2°. Best body text is #FFFFFF at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#1F409F
RGB	rgb(31, 64, 159)
HSL	hsl(225, 67%, 37%)
HSV	hsv(225, 81%, 62%)
CMYK	cmyk(80.5%, 59.7%, 0%, 37.6%)
CIE-LAB	lab(30.55, 24.31, -54.88)
CIE-LCH	lch(30.55, 60.03, 293.89°)
OKLab	oklab(41.03% -0.0132 -0.1586)
OKLCH	oklch(41.03% 0.159 265.2)
XYZ	xyz(8.6543, 6.4603, 33.5850)
Luminance	0.0646 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F409F #9F7E1F

analogous

#1F809F #1F409F #3E1F9F

triadic

#1F409F #9F1F40 #409F1F

tetradic

#1F409F #9F1F80 #9F7E1F #1F9F3E

square

#1F409F #9F1F80 #9F7E1F #1F9F3E

split-complementary

#1F409F #9F3E1F #809F1F

monochromatic

#0B1739 #152B6C #1F409F #2955D2 #5A7CDF

Accessibility & contrast

On white

9.16

#1F409F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1F409F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F409F

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F409F	#FFFFFF	#000000	##FFFFFF
##1F409F	1.00	9.16	2.29	9.16
#FFFFFF	9.16	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA2

Deuteranopia (green-blind)

#00429D

Tritanopia (blue-blind)

#005869

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f409f;
/* rgb */ color: rgb(31, 64, 159);
/* oklch */ color: oklch(41.0% 0.159 265.2);

Tailwind

colors: {
  custom: {
    50: '#7174bc',
    500: '#1f409f',
    950: '#000000',
  },
}

SCSS

$custom: #1f409f;
$custom-light: #7174bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f409f",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 159
  },
  "hsl": {
    "h": 224.531,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.41026,
    "c": 0.15916,
    "h": 265.2
  },
  "luminance": 0.06461
}

Semantic roles & 50–950 ramp

primary

#1F409F

secondary

#C3A757

accent

#BE3EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F409F

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

Preview Lab → · Contrast checker → · Palette generator →