#1F3F9D#1F3F9D

#1F3F9D is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.6% C 0.158 H 265.4°. Best body text is #FFFFFF at 9.31:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F9D
RGB	rgb(31, 63, 157)
HSL	hsl(225, 67%, 37%)
HSV	hsv(225, 80%, 62%)
CMYK	cmyk(80.3%, 59.9%, 0%, 38.4%)
CIE-LAB	lab(30.11, 24.21, -54.38)
CIE-LCH	lch(30.11, 59.53, 294.00°)
OKLab	oklab(40.65% -0.0126 -0.1572)
OKLCH	oklch(40.65% 0.158 265.4)
XYZ	xyz(8.4262, 6.2797, 32.6598)
Luminance	0.0628 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F9D #9D7D1F

analogous

#1F7E9D #1F3F9D #3E1F9D

triadic

#1F3F9D #9D1F3F #3F9D1F

tetradic

#1F3F9D #9D1F7E #9D7D1F #1F9D3E

square

#1F3F9D #9D1F7E #9D7D1F #1F9D3E

split-complementary

#1F3F9D #9D3E1F #7E9D1F

monochromatic

#0B1637 #152A6A #1F3F9D #2954D0 #587ADE

Accessibility & contrast

On white

9.31

#1F3F9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1F3F9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F9D

9.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F9D	#FFFFFF	#000000	##FFFFFF
##1F3F9D	1.00	9.31	2.26	9.31
#FFFFFF	9.31	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA0

Deuteranopia (green-blind)

#00419B

Tritanopia (blue-blind)

#005767

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f3f9d;
/* rgb */ color: rgb(31, 63, 157);
/* oklch */ color: oklch(40.6% 0.158 265.4);

Tailwind

colors: {
  custom: {
    50: '#7073bb',
    500: '#1f3f9d',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f9d;
$custom-light: #7073bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f9d",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 157
  },
  "hsl": {
    "h": 224.762,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.40647,
    "c": 0.15767,
    "h": 265.4
  },
  "luminance": 0.06281
}

Semantic roles & 50–950 ramp

primary

#1F3F9D

secondary

#C2A656

accent

#BE3EEA

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F3F9D

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

Preview Lab → · Contrast checker → · Palette generator →