#1F3C8B#1F3C8B

#1F3C8B is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.5% C 0.136 H 265.2°. Best body text is #FFFFFF at 10.11:1 contrast (WCAG AA passes).

Color values

HEX	#1F3C8B
RGB	rgb(31, 60, 139)
HSL	hsl(224, 64%, 33%)
HSV	hsv(224, 78%, 55%)
CMYK	cmyk(77.7%, 56.8%, 0%, 45.5%)
CIE-LAB	lab(27.81, 19.14, -47.10)
CIE-LCH	lch(27.81, 50.84, 292.12°)
OKLab	oklab(38.46% -0.0114 -0.1358)
OKLCH	oklch(38.46% 0.136 265.2)
XYZ	xyz(6.8395, 5.3863, 25.1003)
Luminance	0.0539 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3C8B #8B6E1F

analogous

#1F728B #1F3C8B #381F8B

triadic

#1F3C8B #8B1F3C #3C8B1F

tetradic

#1F3C8B #8B1F72 #8B6E1F #1F8B38

square

#1F3C8B #8B1F72 #8B6E1F #1F8B38

split-complementary

#1F3C8B #8B381F #728B1F

monochromatic

#091127 #142659 #1F3C8B #2A52BD #4D72D7

Accessibility & contrast

On white

10.11

#1F3C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1F3C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3C8B

10.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3C8B	#FFFFFF	#000000	##FFFFFF
##1F3C8B	1.00	10.11	2.08	10.11
#FFFFFF	10.11	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f3c8b;
/* rgb */ color: rgb(31, 60, 139);
/* oklch */ color: oklch(38.5% 0.136 265.2);

Tailwind

colors: {
  custom: {
    50: '#6c71ae',
    500: '#1f3c8b',
    950: '#000000',
  },
}

SCSS

$custom: #1f3c8b;
$custom-light: #6c71ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3c8b",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 139
  },
  "hsl": {
    "h": 223.889,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.38461,
    "c": 0.13629,
    "h": 265.2
  },
  "luminance": 0.05387
}

Semantic roles & 50–950 ramp

primary

#1F3C8B

secondary

#BA9C4C

accent

#BA41E7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1F3C8B

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

Preview Lab → · Contrast checker → · Palette generator →