#1F388F#1F388F

#1F388F is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.0% C 0.147 H 266.8°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#1F388F
RGB	rgb(31, 56, 143)
HSL	hsl(227, 64%, 34%)
HSV	hsv(227, 78%, 56%)
CMYK	cmyk(78.3%, 60.8%, 0%, 43.9%)
CIE-LAB	lab(27.02, 23.49, -50.85)
CIE-LCH	lch(27.02, 56.01, 294.80°)
OKLab	oklab(37.98% -0.0082 -0.1469)
OKLCH	oklch(37.98% 0.147 266.8)
XYZ	xyz(6.9354, 5.1020, 26.6005)
Luminance	0.0510 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F388F #8F761F

analogous

#1F708F #1F388F #3E1F8F

triadic

#1F388F #8F1F38 #388F1F

tetradic

#1F388F #8F1F70 #8F761F #1F8F3E

square

#1F388F #8F1F70 #8F761F #1F8F3E

split-complementary

#1F388F #8F3E1F #708F1F

monochromatic

#09112A #14245D #1F388F #2A4CC1 #4F6ED9

Accessibility & contrast

On white

10.39

#1F388F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1F388F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F388F

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F388F	#FFFFFF	#000000	##FFFFFF
##1F388F	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004592

Deuteranopia (green-blind)

#003B8D

Tritanopia (blue-blind)

#004E5E

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f388f;
/* rgb */ color: rgb(31, 56, 143);
/* oklch */ color: oklch(38.0% 0.147 266.8);

Tailwind

colors: {
  custom: {
    50: '#6d6eb1',
    500: '#1f388f',
    950: '#000000',
  },
}

SCSS

$custom: #1f388f;
$custom-light: #6d6eb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f388f",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 143
  },
  "hsl": {
    "h": 226.607,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.37976,
    "c": 0.14712,
    "h": 266.8
  },
  "luminance": 0.05103
}

Semantic roles & 50–950 ramp

primary

#1F388F

secondary

#BCA34E

accent

#C240E7

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F388F

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

Preview Lab → · Contrast checker → · Palette generator →