#1F388E#1F388E

#1F388E is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.9% C 0.146 H 266.8°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#1F388E
RGB	rgb(31, 56, 142)
HSL	hsl(226, 64%, 34%)
HSV	hsv(226, 78%, 56%)
CMYK	cmyk(78.2%, 60.6%, 0%, 44.3%)
CIE-LAB	lab(26.94, 23.10, -50.37)
CIE-LCH	lch(26.94, 55.41, 294.63°)
OKLab	oklab(37.89% -0.0083 -0.1455)
OKLCH	oklch(37.89% 0.146 266.8)
XYZ	xyz(6.8600, 5.0719, 26.2034)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F388E #8E751F

analogous

#1F708E #1F388E #3D1F8E

triadic

#1F388E #8E1F38 #388E1F

tetradic

#1F388E #8E1F70 #8E751F #1F8E3D

square

#1F388E #8E1F70 #8E751F #1F8E3D

split-complementary

#1F388E #8E3D1F #708E1F

monochromatic

#09102A #14245C #1F388E #2A4CC0 #4F6ED9

Accessibility & contrast

On white

10.42

#1F388E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1F388E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F388E

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F388E	#FFFFFF	#000000	##FFFFFF
##1F388E	1.00	10.42	2.01	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004591

Deuteranopia (green-blind)

#003B8C

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f388e;
/* rgb */ color: rgb(31, 56, 142);
/* oklch */ color: oklch(37.9% 0.146 266.8);

Tailwind

colors: {
  custom: {
    50: '#6d6eb0',
    500: '#1f388e',
    950: '#000000',
  },
}

SCSS

$custom: #1f388e;
$custom-light: #6d6eb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f388e",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 142
  },
  "hsl": {
    "h": 226.486,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.37886,
    "c": 0.14572,
    "h": 266.8
  },
  "luminance": 0.05073
}

Semantic roles & 50–950 ramp

primary

#1F388E

secondary

#BBA34D

accent

#C241E7

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1F388E

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

Preview Lab → · Contrast checker → · Palette generator →