#1F2B8A#1F2B8A

#1F2B8A is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.0% C 0.156 H 270.1°. Best body text is #FFFFFF at 11.86:1 contrast (WCAG AA passes).

Color values

HEX	#1F2B8A
RGB	rgb(31, 43, 138)
HSL	hsl(233, 63%, 33%)
HSV	hsv(233, 78%, 54%)
CMYK	cmyk(77.5%, 68.8%, 0%, 45.9%)
CIE-LAB	lab(23.18, 30.37, -54.04)
CIE-LCH	lch(23.18, 61.99, 299.33°)
OKLab	oklab(35% 0.0004 -0.1564)
OKLCH	oklch(35% 0.156 270.1)
XYZ	xyz(6.0148, 3.8534, 24.4666)
Luminance	0.0385 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2B8A #8A7E1F

analogous

#1F608A #1F2B8A #481F8A

triadic

#1F2B8A #8A1F2B #2B8A1F

tetradic

#1F2B8A #8A1F60 #8A7E1F #1F8A48

square

#1F2B8A #8A1F60 #8A7E1F #1F8A48

split-complementary

#1F2B8A #8A481F #608A1F

monochromatic

#090C26 #141B58 #1F2B8A #2A3BBC #4C5CD7

Accessibility & contrast

On white

11.86

#1F2B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1F2B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2B8A

11.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2B8A	#FFFFFF	#000000	##FFFFFF
##1F2B8A	1.00	11.86	1.77	11.86
#FFFFFF	11.86	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8D

Deuteranopia (green-blind)

#003288

Tritanopia (blue-blind)

#004556

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f2b8a;
/* rgb */ color: rgb(31, 43, 138);
/* oklch */ color: oklch(35.0% 0.156 270.1);

Tailwind

colors: {
  custom: {
    50: '#6d64ad',
    500: '#1f2b8a',
    950: '#000000',
  },
}

SCSS

$custom: #1f2b8a;
$custom-light: #6d64ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2b8a",
  "rgb": {
    "r": 31,
    "g": 43,
    "b": 138
  },
  "hsl": {
    "h": 233.271,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.35002,
    "c": 0.15636,
    "h": 270.1
  },
  "luminance": 0.03854
}

Semantic roles & 50–950 ramp

primary

#1F2B8A

secondary

#BAAD4B

accent

#D441E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080510

muted

#7B7A7F

Preview Lab

Preview with #1F2B8A

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

Preview Lab → · Contrast checker → · Palette generator →