#1F388D#1F388D

#1F388D is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.8% C 0.144 H 266.7°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#1F388D
RGB	rgb(31, 56, 141)
HSL	hsl(226, 64%, 34%)
HSV	hsv(226, 78%, 55%)
CMYK	cmyk(78%, 60.3%, 0%, 44.7%)
CIE-LAB	lab(26.85, 22.70, -49.89)
CIE-LCH	lch(26.85, 54.81, 294.47°)
OKLab	oklab(37.8% -0.0083 -0.1441)
OKLCH	oklch(37.8% 0.144 266.7)
XYZ	xyz(6.7853, 5.0420, 25.8097)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F388D #8D741F

analogous

#1F6F8D #1F388D #3D1F8D

triadic

#1F388D #8D1F38 #388D1F

tetradic

#1F388D #8D1F6F #8D741F #1F8D3D

square

#1F388D #8D1F6F #8D741F #1F8D3D

split-complementary

#1F388D #8D3D1F #6F8D1F

monochromatic

#091029 #14245B #1F388D #2A4CBF #4E6ED8

Accessibility & contrast

On white

10.46

#1F388D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1F388D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F388D

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F388D	#FFFFFF	#000000	##FFFFFF
##1F388D	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004590

Deuteranopia (green-blind)

#003B8B

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f388d;
/* rgb */ color: rgb(31, 56, 141);
/* oklch */ color: oklch(37.8% 0.144 266.7);

Tailwind

colors: {
  custom: {
    50: '#6d6eaf',
    500: '#1f388d',
    950: '#000000',
  },
}

SCSS

$custom: #1f388d;
$custom-light: #6d6eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#1f388d",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 141
  },
  "hsl": {
    "h": 226.364,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.37796,
    "c": 0.14432,
    "h": 266.7
  },
  "luminance": 0.05043
}

Semantic roles & 50–950 ramp

primary

#1F388D

secondary

#BBA24D

accent

#C141E7

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1F388D

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

Preview Lab → · Contrast checker → · Palette generator →