#1F2B8F#1F2B8F

#1F2B8F is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.5% C 0.163 H 270.0°. Best body text is #FFFFFF at 11.66:1 contrast (WCAG AA passes).

Color values

HEX	#1F2B8F
RGB	rgb(31, 43, 143)
HSL	hsl(234, 64%, 34%)
HSV	hsv(234, 78%, 56%)
CMYK	cmyk(78.3%, 69.9%, 0%, 43.9%)
CIE-LAB	lab(23.68, 32.24, -56.33)
CIE-LCH	lch(23.68, 64.91, 299.78°)
OKLab	oklab(35.51% -0.0001 -0.1631)
OKLCH	oklch(35.51% 0.163 270)
XYZ	xyz(6.3852, 4.0015, 26.4171)
Luminance	0.0400 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2B8F #8F831F

analogous

#1F638F #1F2B8F #4B1F8F

triadic

#1F2B8F #8F1F2B #2B8F1F

tetradic

#1F2B8F #8F1F63 #8F831F #1F8F4B

square

#1F2B8F #8F1F63 #8F831F #1F8F4B

split-complementary

#1F2B8F #8F4B1F #638F1F

monochromatic

#090D2A #141C5D #1F2B8F #2A3AC1 #4F5ED9

Accessibility & contrast

On white

11.66

#1F2B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1F2B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2B8F

11.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2B8F	#FFFFFF	#000000	##FFFFFF
##1F2B8F	1.00	11.66	1.80	11.66
#FFFFFF	11.66	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E92

Deuteranopia (green-blind)

#00338D

Tritanopia (blue-blind)

#004659

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f2b8f;
/* rgb */ color: rgb(31, 43, 143);
/* oklch */ color: oklch(35.5% 0.163 270.0);

Tailwind

colors: {
  custom: {
    50: '#6e64b1',
    500: '#1f2b8f',
    950: '#000000',
  },
}

SCSS

$custom: #1f2b8f;
$custom-light: #6e64b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2b8f",
  "rgb": {
    "r": 31,
    "g": 43,
    "b": 143
  },
  "hsl": {
    "h": 233.571,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.35513,
    "c": 0.16306,
    "h": 270
  },
  "luminance": 0.04002
}

Semantic roles & 50–950 ramp

primary

#1F2B8F

secondary

#BCB04E

accent

#D540E7

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080511

muted

#7B7A80

Preview Lab

Preview with #1F2B8F

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

Preview Lab → · Contrast checker → · Palette generator →