#1F3BA7#1F3BA7

#1F3BA7 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.8% C 0.176 H 266.7°. Best body text is #FFFFFF at 9.37:1 contrast (WCAG AA passes).

Color values

HEX	#1F3BA7
RGB	rgb(31, 59, 167)
HSL	hsl(228, 69%, 39%)
HSV	hsv(228, 81%, 65%)
CMYK	cmyk(81.4%, 64.7%, 0%, 34.5%)
CIE-LAB	lab(29.93, 30.77, -60.71)
CIE-LCH	lch(29.93, 68.06, 296.88°)
OKLab	oklab(40.79% -0.0102 -0.1758)
OKLCH	oklch(40.79% 0.176 266.7)
XYZ	xyz(9.1016, 6.2082, 37.2703)
Luminance	0.0621 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3BA7 #A78B1F

analogous

#1F7FA7 #1F3BA7 #471FA7

triadic

#1F3BA7 #A71F3B #3BA71F

tetradic

#1F3BA7 #A71F7F #A78B1F #1FA747

square

#1F3BA7 #A71F7F #A78B1F #1FA747

split-complementary

#1F3BA7 #A7471F #7FA71F

monochromatic

#0C1740 #152973 #1F3BA7 #2B4FD8 #5F7AE1

Accessibility & contrast

On white

9.37

#1F3BA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#1F3BA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3BA7

9.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3BA7	#FFFFFF	#000000	##FFFFFF
##1F3BA7	1.00	9.37	2.24	9.37
#FFFFFF	9.37	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DAA

Deuteranopia (green-blind)

#0040A5

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f3ba7;
/* rgb */ color: rgb(31, 59, 167);
/* oklch */ color: oklch(40.8% 0.176 266.7);

Tailwind

colors: {
  custom: {
    50: '#7370c2',
    500: '#1f3ba7',
    950: '#000000',
  },
}

SCSS

$custom: #1f3ba7;
$custom-light: #7370c2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3ba7",
  "rgb": {
    "r": 31,
    "g": 59,
    "b": 167
  },
  "hsl": {
    "h": 227.647,
    "s": 68.687,
    "l": 38.824
  },
  "oklch": {
    "l": 0.40787,
    "c": 0.17606,
    "h": 266.7
  },
  "luminance": 0.06209
}

Semantic roles & 50–950 ramp

primary

#1F3BA7

secondary

#C6B05C

accent

#C73CEC

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #1F3BA7

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

Preview Lab → · Contrast checker → · Palette generator →