#1F3EAF#1F3EAF

#1F3EAF is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.1% C 0.183 H 266.2°. Best body text is #FFFFFF at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#1F3EAF
RGB	rgb(31, 62, 175)
HSL	hsl(227, 70%, 40%)
HSV	hsv(227, 82%, 69%)
CMYK	cmyk(82.3%, 64.6%, 0%, 31.4%)
CIE-LAB	lab(31.42, 31.83, -63.07)
CIE-LCH	lch(31.42, 70.65, 296.78°)
OKLab	oklab(42.11% -0.012 -0.1826)
OKLCH	oklch(42.11% 0.183 266.2)
XYZ	xyz(10.0228, 6.8305, 41.3393)
Luminance	0.0683 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3EAF #AF901F

analogous

#1F86AF #1F3EAF #481FAF

triadic

#1F3EAF #AF1F3E #3EAF1F

tetradic

#1F3EAF #AF1F86 #AF901F #1FAF48

square

#1F3EAF #AF1F86 #AF901F #1FAF48

split-complementary

#1F3EAF #AF481F #86AF1F

monochromatic

#0D1947 #162C7B #1F3EAF #3155DA #6580E4

Accessibility & contrast

On white

8.87

#1F3EAF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#1F3EAF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3EAF

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3EAF	#FFFFFF	#000000	##FFFFFF
##1F3EAF	1.00	8.87	2.37	8.87
#FFFFFF	8.87	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B3

Deuteranopia (green-blind)

#0043AD

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1f3eaf;
/* rgb */ color: rgb(31, 62, 175);
/* oklch */ color: oklch(42.1% 0.183 266.2);

Tailwind

colors: {
  custom: {
    50: '#7573c8',
    500: '#1f3eaf',
    950: '#000000',
  },
}

SCSS

$custom: #1f3eaf;
$custom-light: #7573c8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3eaf",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 175
  },
  "hsl": {
    "h": 227.083,
    "s": 69.903,
    "l": 40.392
  },
  "oklch": {
    "l": 0.42105,
    "c": 0.183,
    "h": 266.2
  },
  "luminance": 0.06832
}

Semantic roles & 50–950 ramp

primary

#1F3EAF

secondary

#C9B261

accent

#C63BED

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F3EAF

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

Preview Lab → · Contrast checker → · Palette generator →