#1F389D#1F389D

#1F389D is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.3% C 0.166 H 267.2°. Best body text is #FFFFFF at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#1F389D
RGB	rgb(31, 56, 157)
HSL	hsl(228, 67%, 37%)
HSV	hsv(228, 80%, 62%)
CMYK	cmyk(80.3%, 64.3%, 0%, 38.4%)
CIE-LAB	lab(28.26, 28.94, -57.41)
CIE-LCH	lch(28.26, 64.29, 296.75°)
OKLab	oklab(39.27% -0.0083 -0.1661)
OKLCH	oklch(39.27% 0.166 267.2)
XYZ	xyz(8.0629, 5.5530, 32.5386)
Luminance	0.0555 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F389D #9D841F

analogous

#1F779D #1F389D #451F9D

triadic

#1F389D #9D1F38 #389D1F

tetradic

#1F389D #9D1F77 #9D841F #1F9D45

square

#1F389D #9D1F77 #9D841F #1F9D45

split-complementary

#1F389D #9D451F #779D1F

monochromatic

#0B1437 #15266A #1F389D #294AD0 #5873DE

Accessibility & contrast

On white

9.95

#1F389D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1F389D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F389D

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F389D	#FFFFFF	#000000	##FFFFFF
##1F389D	1.00	9.95	2.11	9.95
#FFFFFF	9.95	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049A0

Deuteranopia (green-blind)

#003D9B

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f389d;
/* rgb */ color: rgb(31, 56, 157);
/* oklch */ color: oklch(39.3% 0.166 267.2);

Tailwind

colors: {
  custom: {
    50: '#716ebb',
    500: '#1f389d',
    950: '#000000',
  },
}

SCSS

$custom: #1f389d;
$custom-light: #716ebb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f389d",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 157
  },
  "hsl": {
    "h": 228.095,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.39271,
    "c": 0.16634,
    "h": 267.2
  },
  "luminance": 0.05554
}

Semantic roles & 50–950 ramp

primary

#1F389D

secondary

#C2AC56

accent

#C83EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F389D

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

Preview Lab → · Contrast checker → · Palette generator →