#1F338D#1F338D

#1F338D is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.8% C 0.151 H 268.2°. Best body text is #FFFFFF at 10.96:1 contrast (WCAG AA passes).

Color values

HEX	#1F338D
RGB	rgb(31, 51, 141)
HSL	hsl(229, 64%, 34%)
HSV	hsv(229, 78%, 55%)
CMYK	cmyk(78%, 63.8%, 0%, 44.7%)
CIE-LAB	lab(25.51, 26.14, -52.09)
CIE-LCH	lch(25.51, 58.28, 296.64°)
OKLab	oklab(36.8% -0.0048 -0.1506)
OKLCH	oklch(36.8% 0.151 268.2)
XYZ	xyz(6.5550, 4.5813, 25.7330)
Luminance	0.0458 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F338D #8D791F

analogous

#1F6A8D #1F338D #421F8D

triadic

#1F338D #8D1F33 #338D1F

tetradic

#1F338D #8D1F6A #8D791F #1F8D42

square

#1F338D #8D1F6A #8D791F #1F8D42

split-complementary

#1F338D #8D421F #6A8D1F

monochromatic

#090F29 #14215B #1F338D #2A45BF #4E67D8

Accessibility & contrast

On white

10.96

#1F338D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1F338D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F338D

10.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F338D	#FFFFFF	#000000	##FFFFFF
##1F338D	1.00	10.96	1.92	10.96
#FFFFFF	10.96	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004290

Deuteranopia (green-blind)

#00378B

Tritanopia (blue-blind)

#004A5B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f338d;
/* rgb */ color: rgb(31, 51, 141);
/* oklch */ color: oklch(36.8% 0.151 268.2);

Tailwind

colors: {
  custom: {
    50: '#6d6aaf',
    500: '#1f338d',
    950: '#000000',
  },
}

SCSS

$custom: #1f338d;
$custom-light: #6d6aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#1f338d",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 141
  },
  "hsl": {
    "h": 229.091,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.36795,
    "c": 0.15067,
    "h": 268.2
  },
  "luminance": 0.04582
}

Semantic roles & 50–950 ramp

primary

#1F338D

secondary

#BBA74D

accent

#C941E7

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F338D

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

Preview Lab → · Contrast checker → · Palette generator →