#1F389E#1F389E

#1F389E is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.4% C 0.168 H 267.2°. Best body text is #FFFFFF at 9.92:1 contrast (WCAG AA passes).

Color values

HEX	#1F389E
RGB	rgb(31, 56, 158)
HSL	hsl(228, 67%, 37%)
HSV	hsv(228, 80%, 62%)
CMYK	cmyk(80.4%, 64.6%, 0%, 38%)
CIE-LAB	lab(28.35, 29.32, -57.87)
CIE-LCH	lch(28.35, 64.88, 296.87°)
OKLab	oklab(39.37% -0.0083 -0.1675)
OKLCH	oklch(39.37% 0.168 267.2)
XYZ	xyz(8.1486, 5.5873, 32.9901)
Luminance	0.0559 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F389E #9E851F

analogous

#1F789E #1F389E #461F9E

triadic

#1F389E #9E1F38 #389E1F

tetradic

#1F389E #9E1F78 #9E851F #1F9E46

square

#1F389E #9E1F78 #9E851F #1F9E46

split-complementary

#1F389E #9E461F #789E1F

monochromatic

#0B1438 #15266B #1F389E #294AD1 #5973DE

Accessibility & contrast

On white

9.92

#1F389E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1F389E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F389E

9.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F389E	#FFFFFF	#000000	##FFFFFF
##1F389E	1.00	9.92	2.12	9.92
#FFFFFF	9.92	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049A1

Deuteranopia (green-blind)

#003D9C

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f389e;
/* rgb */ color: rgb(31, 56, 158);
/* oklch */ color: oklch(39.4% 0.168 267.2);

Tailwind

colors: {
  custom: {
    50: '#716ebc',
    500: '#1f389e',
    950: '#000000',
  },
}

SCSS

$custom: #1f389e;
$custom-light: #716ebc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f389e",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 158
  },
  "hsl": {
    "h": 228.189,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.39366,
    "c": 0.16768,
    "h": 267.2
  },
  "luminance": 0.05588
}

Semantic roles & 50–950 ramp

primary

#1F389E

secondary

#C2AD56

accent

#C83EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F389E

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

Preview Lab → · Contrast checker → · Palette generator →