#1F3BA1#1F3BA1

#1F3BA1 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.2% C 0.168 H 266.6°. Best body text is #FFFFFF at 9.55:1 contrast (WCAG AA passes).

Color values

HEX	#1F3BA1
RGB	rgb(31, 59, 161)
HSL	hsl(227, 68%, 38%)
HSV	hsv(227, 81%, 63%)
CMYK	cmyk(80.7%, 63.4%, 0%, 36.9%)
CIE-LAB	lab(29.39, 28.47, -57.98)
CIE-LCH	lch(29.39, 64.59, 296.15°)
OKLab	oklab(40.22% -0.0101 -0.1677)
OKLCH	oklch(40.22% 0.168 266.6)
XYZ	xyz(8.5598, 5.9914, 34.4166)
Luminance	0.0599 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3BA1 #A1851F

analogous

#1F7CA1 #1F3BA1 #441FA1

triadic

#1F3BA1 #A11F3B #3BA11F

tetradic

#1F3BA1 #A11F7C #A1851F #1FA144

square

#1F3BA1 #A11F7C #A1851F #1FA144

split-complementary

#1F3BA1 #A1441F #7CA11F

monochromatic

#0B153A #15286E #1F3BA1 #294ED4 #5B78DF

Accessibility & contrast

On white

9.55

#1F3BA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1F3BA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3BA1

9.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3BA1	#FFFFFF	#000000	##FFFFFF
##1F3BA1	1.00	9.55	2.20	9.55
#FFFFFF	9.55	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA4

Deuteranopia (green-blind)

#003F9F

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f3ba1;
/* rgb */ color: rgb(31, 59, 161);
/* oklch */ color: oklch(40.2% 0.168 266.6);

Tailwind

colors: {
  custom: {
    50: '#7270be',
    500: '#1f3ba1',
    950: '#000000',
  },
}

SCSS

$custom: #1f3ba1;
$custom-light: #7270be;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3ba1",
  "rgb": {
    "r": 31,
    "g": 59,
    "b": 161
  },
  "hsl": {
    "h": 227.077,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.40221,
    "c": 0.16805,
    "h": 266.6
  },
  "luminance": 0.05992
}

Semantic roles & 50–950 ramp

primary

#1F3BA1

secondary

#C4AC58

accent

#C53DEB

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F3BA1

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

Preview Lab → · Contrast checker → · Palette generator →