#1F409C#1F409C

#1F409C is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.8% C 0.155 H 265.1°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#1F409C
RGB	rgb(31, 64, 156)
HSL	hsl(224, 67%, 37%)
HSV	hsv(224, 80%, 61%)
CMYK	cmyk(80.1%, 59%, 0%, 38.8%)
CIE-LAB	lab(30.30, 23.13, -53.47)
CIE-LCH	lch(30.30, 58.26, 293.40°)
OKLab	oklab(40.76% -0.0133 -0.1545)
OKLCH	oklch(40.76% 0.155 265.1)
XYZ	xyz(8.3971, 6.3574, 32.2306)
Luminance	0.0636 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F409C #9C7B1F

analogous

#1F7F9C #1F409C #3D1F9C

triadic

#1F409C #9C1F40 #409C1F

tetradic

#1F409C #9C1F7F #9C7B1F #1F9C3D

square

#1F409C #9C1F7F #9C7B1F #1F9C3D

split-complementary

#1F409C #9C3D1F #7F9C1F

monochromatic

#0B1636 #152B69 #1F409C #2955CF #587BDE

Accessibility & contrast

On white

9.24

#1F409C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1F409C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F409C

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F409C	#FFFFFF	#000000	##FFFFFF
##1F409C	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9F

Deuteranopia (green-blind)

#00429A

Tritanopia (blue-blind)

#005767

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f409c;
/* rgb */ color: rgb(31, 64, 156);
/* oklch */ color: oklch(40.8% 0.155 265.1);

Tailwind

colors: {
  custom: {
    50: '#7074ba',
    500: '#1f409c',
    950: '#000000',
  },
}

SCSS

$custom: #1f409c;
$custom-light: #7074ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f409c",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 156
  },
  "hsl": {
    "h": 224.16,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.40763,
    "c": 0.15503,
    "h": 265.1
  },
  "luminance": 0.06358
}

Semantic roles & 50–950 ramp

primary

#1F409C

secondary

#C1A555

accent

#BC3EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F409C

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

Preview Lab → · Contrast checker → · Palette generator →