#1F2B8B#1F2B8B

#1F2B8B is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.1% C 0.158 H 270.1°. Best body text is #FFFFFF at 11.82:1 contrast (WCAG AA passes).

Color values

HEX	#1F2B8B
RGB	rgb(31, 43, 139)
HSL	hsl(233, 64%, 33%)
HSV	hsv(233, 78%, 55%)
CMYK	cmyk(77.7%, 69.1%, 0%, 45.5%)
CIE-LAB	lab(23.28, 30.74, -54.50)
CIE-LCH	lch(23.28, 62.57, 299.43°)
OKLab	oklab(35.1% 0.0003 -0.1577)
OKLCH	oklch(35.1% 0.158 270.1)
XYZ	xyz(6.0876, 3.8825, 24.8497)
Luminance	0.0388 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2B8B #8B7F1F

analogous

#1F618B #1F2B8B #491F8B

triadic

#1F2B8B #8B1F2B #2B8B1F

tetradic

#1F2B8B #8B1F61 #8B7F1F #1F8B49

square

#1F2B8B #8B1F61 #8B7F1F #1F8B49

split-complementary

#1F2B8B #8B491F #618B1F

monochromatic

#090C27 #141C59 #1F2B8B #2A3ABD #4D5CD7

Accessibility & contrast

On white

11.82

#1F2B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1F2B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2B8B

11.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2B8B	#FFFFFF	#000000	##FFFFFF
##1F2B8B	1.00	11.82	1.78	11.82
#FFFFFF	11.82	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D8E

Deuteranopia (green-blind)

#003289

Tritanopia (blue-blind)

#004557

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f2b8b;
/* rgb */ color: rgb(31, 43, 139);
/* oklch */ color: oklch(35.1% 0.158 270.1);

Tailwind

colors: {
  custom: {
    50: '#6d64ae',
    500: '#1f2b8b',
    950: '#000000',
  },
}

SCSS

$custom: #1f2b8b;
$custom-light: #6d64ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2b8b",
  "rgb": {
    "r": 31,
    "g": 43,
    "b": 139
  },
  "hsl": {
    "h": 233.333,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.35103,
    "c": 0.15771,
    "h": 270.1
  },
  "luminance": 0.03883
}

Semantic roles & 50–950 ramp

primary

#1F2B8B

secondary

#BAAE4C

accent

#D441E7

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080510

muted

#7B7A7F

Preview Lab

Preview with #1F2B8B

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

Preview Lab → · Contrast checker → · Palette generator →