#1F3F9C#1F3F9C

#1F3F9C is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.6% C 0.156 H 265.4°. Best body text is #FFFFFF at 9.34:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F9C
RGB	rgb(31, 63, 156)
HSL	hsl(225, 67%, 37%)
HSV	hsv(225, 80%, 61%)
CMYK	cmyk(80.1%, 59.6%, 0%, 38.8%)
CIE-LAB	lab(30.02, 23.81, -53.91)
CIE-LCH	lch(30.02, 58.94, 293.83°)
OKLab	oklab(40.56% -0.0127 -0.1558)
OKLCH	oklch(40.56% 0.156 265.4)
XYZ	xyz(8.3412, 6.2457, 32.2120)
Luminance	0.0625 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F9C #9C7C1F

analogous

#1F7E9C #1F3F9C #3E1F9C

triadic

#1F3F9C #9C1F3F #3F9C1F

tetradic

#1F3F9C #9C1F7E #9C7C1F #1F9C3E

square

#1F3F9C #9C1F7E #9C7C1F #1F9C3E

split-complementary

#1F3F9C #9C3E1F #7E9C1F

monochromatic

#0B1636 #152A69 #1F3F9C #2954CF #587ADE

Accessibility & contrast

On white

9.34

#1F3F9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1F3F9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F9C

9.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F9C	#FFFFFF	#000000	##FFFFFF
##1F3F9C	1.00	9.34	2.25	9.34
#FFFFFF	9.34	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9F

Deuteranopia (green-blind)

#00419A

Tritanopia (blue-blind)

#005767

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f3f9c;
/* rgb */ color: rgb(31, 63, 156);
/* oklch */ color: oklch(40.6% 0.156 265.4);

Tailwind

colors: {
  custom: {
    50: '#7073ba',
    500: '#1f3f9c',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f9c;
$custom-light: #7073ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f9c",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 156
  },
  "hsl": {
    "h": 224.64,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.40558,
    "c": 0.15629,
    "h": 265.4
  },
  "luminance": 0.06247
}

Semantic roles & 50–950 ramp

primary

#1F3F9C

secondary

#C1A655

accent

#BE3EEA

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F3F9C

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

Preview Lab → · Contrast checker → · Palette generator →