#1F2A8B#1F2A8B

#1F2A8B is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.9% C 0.159 H 270.3°. Best body text is #FFFFFF at 11.92:1 contrast (WCAG AA passes).

Color values

HEX	#1F2A8B
RGB	rgb(31, 42, 139)
HSL	hsl(234, 64%, 33%)
HSV	hsv(234, 78%, 55%)
CMYK	cmyk(77.7%, 69.8%, 0%, 45.5%)
CIE-LAB	lab(23.04, 31.40, -54.90)
CIE-LCH	lch(23.04, 63.24, 299.77°)
OKLab	oklab(34.93% 0.0008 -0.1589)
OKLCH	oklch(34.93% 0.159 270.3)
XYZ	xyz(6.0516, 3.8107, 24.8377)
Luminance	0.0381 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2A8B #8B801F

analogous

#1F608B #1F2A8B #4A1F8B

triadic

#1F2A8B #8B1F2A #2A8B1F

tetradic

#1F2A8B #8B1F60 #8B801F #1F8B4A

square

#1F2A8B #8B1F60 #8B801F #1F8B4A

split-complementary

#1F2A8B #8B4A1F #608B1F

monochromatic

#090C27 #141B59 #1F2A8B #2A39BD #4D5BD7

Accessibility & contrast

On white

11.92

#1F2A8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1F2A8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2A8B

11.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2A8B	#FFFFFF	#000000	##FFFFFF
##1F2A8B	1.00	11.92	1.76	11.92
#FFFFFF	11.92	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8E

Deuteranopia (green-blind)

#003289

Tritanopia (blue-blind)

#004457

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f2a8b;
/* rgb */ color: rgb(31, 42, 139);
/* oklch */ color: oklch(34.9% 0.159 270.3);

Tailwind

colors: {
  custom: {
    50: '#6d64ae',
    500: '#1f2a8b',
    950: '#000000',
  },
}

SCSS

$custom: #1f2a8b;
$custom-light: #6d64ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2a8b",
  "rgb": {
    "r": 31,
    "g": 42,
    "b": 139
  },
  "hsl": {
    "h": 233.889,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.34926,
    "c": 0.15888,
    "h": 270.3
  },
  "luminance": 0.03811
}

Semantic roles & 50–950 ramp

primary

#1F2A8B

secondary

#BAAF4C

accent

#D641E7

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F2A8B

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

Preview Lab → · Contrast checker → · Palette generator →