#1F33A6#1F33A6

#1F33A6 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 39.3% C 0.184 H 268.1°. Best body text is #FFFFFF at 10.08:1 contrast (WCAG AA passes).

Color values

HEX	#1F33A6
RGB	rgb(31, 51, 166)
HSL	hsl(231, 69%, 39%)
HSV	hsv(231, 81%, 65%)
CMYK	cmyk(81.3%, 69.3%, 0%, 34.9%)
CIE-LAB	lab(27.88, 35.61, -63.49)
CIE-LCH	lch(27.88, 72.79, 299.29°)
OKLab	oklab(39.25% -0.0062 -0.1839)
OKLCH	oklch(39.25% 0.184 268.1)
XYZ	xyz(8.6294, 5.4111, 36.6586)
Luminance	0.0541 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F33A6 #A6921F

analogous

#1F76A6 #1F33A6 #4E1FA6

triadic

#1F33A6 #A61F33 #33A61F

tetradic

#1F33A6 #A61F76 #A6921F #1FA64E

square

#1F33A6 #A61F76 #A6921F #1FA64E

split-complementary

#1F33A6 #A64E1F #76A61F

monochromatic

#0C133F #152372 #1F33A6 #2B44D7 #5E72E1

Accessibility & contrast

On white

10.08

#1F33A6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1F33A6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F33A6

10.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F33A6	#FFFFFF	#000000	##FFFFFF
##1F33A6	1.00	10.08	2.08	10.08
#FFFFFF	10.08	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048AA

Deuteranopia (green-blind)

#003BA4

Tritanopia (blue-blind)

#005368

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f33a6;
/* rgb */ color: rgb(31, 51, 166);
/* oklch */ color: oklch(39.3% 0.184 268.1);

Tailwind

colors: {
  custom: {
    50: '#746bc2',
    500: '#1f33a6',
    950: '#000000',
  },
}

SCSS

$custom: #1f33a6;
$custom-light: #746bc2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f33a6",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 166
  },
  "hsl": {
    "h": 231.111,
    "s": 68.528,
    "l": 38.627
  },
  "oklch": {
    "l": 0.39253,
    "c": 0.18401,
    "h": 268.1
  },
  "luminance": 0.05412
}

Semantic roles & 50–950 ramp

primary

#1F33A6

secondary

#C5B65B

accent

#D13CEB

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #1F33A6

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

Preview Lab → · Contrast checker → · Palette generator →