#1F338E#1F338E

#1F338E is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.9% C 0.152 H 268.2°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).

Color values

HEX	#1F338E
RGB	rgb(31, 51, 142)
HSL	hsl(229, 64%, 34%)
HSV	hsv(229, 78%, 56%)
CMYK	cmyk(78.2%, 64.1%, 0%, 44.3%)
CIE-LAB	lab(25.60, 26.52, -52.56)
CIE-LCH	lch(25.60, 58.87, 296.78°)
OKLab	oklab(36.89% -0.0048 -0.152)
OKLCH	oklch(36.89% 0.152 268.2)
XYZ	xyz(6.6297, 4.6112, 26.1266)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F338E #8E7A1F

analogous

#1F6B8E #1F338E #431F8E

triadic

#1F338E #8E1F33 #338E1F

tetradic

#1F338E #8E1F6B #8E7A1F #1F8E43

square

#1F338E #8E1F6B #8E7A1F #1F8E43

split-complementary

#1F338E #8E431F #6B8E1F

monochromatic

#090F2A #14215C #1F338E #2A45C0 #4F68D9

Accessibility & contrast

On white

10.92

#1F338E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1F338E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F338E

10.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F338E	#FFFFFF	#000000	##FFFFFF
##1F338E	1.00	10.92	1.92	10.92
#FFFFFF	10.92	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004291

Deuteranopia (green-blind)

#00388C

Tritanopia (blue-blind)

#004B5B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f338e;
/* rgb */ color: rgb(31, 51, 142);
/* oklch */ color: oklch(36.9% 0.152 268.2);

Tailwind

colors: {
  custom: {
    50: '#6d6ab0',
    500: '#1f338e',
    950: '#000000',
  },
}

SCSS

$custom: #1f338e;
$custom-light: #6d6ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f338e",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 142
  },
  "hsl": {
    "h": 229.189,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.3689,
    "c": 0.15206,
    "h": 268.2
  },
  "luminance": 0.04612
}

Semantic roles & 50–950 ramp

primary

#1F338E

secondary

#BBA84D

accent

#C941E7

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1F338E

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

Preview Lab → · Contrast checker → · Palette generator →