#1F2F8B#1F2F8B

#1F2F8B is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.8% C 0.153 H 269.2°. Best body text is #FFFFFF at 11.43:1 contrast (WCAG AA passes).

Color values

HEX	#1F2F8B
RGB	rgb(31, 47, 139)
HSL	hsl(231, 64%, 33%)
HSV	hsv(231, 78%, 55%)
CMYK	cmyk(77.7%, 66.2%, 0%, 45.5%)
CIE-LAB	lab(24.28, 28.08, -52.85)
CIE-LCH	lch(24.28, 59.85, 297.98°)
OKLab	oklab(35.84% -0.0022 -0.1529)
OKLCH	oklch(35.84% 0.153 269.2)
XYZ	xyz(6.2402, 4.1877, 24.9005)
Luminance	0.0419 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2F8B #8B7B1F

analogous

#1F658B #1F2F8B #451F8B

triadic

#1F2F8B #8B1F2F #2F8B1F

tetradic

#1F2F8B #8B1F65 #8B7B1F #1F8B45

square

#1F2F8B #8B1F65 #8B7B1F #1F8B45

split-complementary

#1F2F8B #8B451F #658B1F

monochromatic

#090D27 #141E59 #1F2F8B #2A40BD #4D62D7

Accessibility & contrast

On white

11.43

#1F2F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#1F2F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2F8B

11.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2F8B	#FFFFFF	#000000	##FFFFFF
##1F2F8B	1.00	11.43	1.84	11.43
#FFFFFF	11.43	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8E

Deuteranopia (green-blind)

#003589

Tritanopia (blue-blind)

#004758

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1f2f8b;
/* rgb */ color: rgb(31, 47, 139);
/* oklch */ color: oklch(35.8% 0.153 269.2);

Tailwind

colors: {
  custom: {
    50: '#6d67ae',
    500: '#1f2f8b',
    950: '#000000',
  },
}

SCSS

$custom: #1f2f8b;
$custom-light: #6d67ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2f8b",
  "rgb": {
    "r": 31,
    "g": 47,
    "b": 139
  },
  "hsl": {
    "h": 231.111,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.35837,
    "c": 0.15289,
    "h": 269.2
  },
  "luminance": 0.04188
}

Semantic roles & 50–950 ramp

primary

#1F2F8B

secondary

#BAAA4C

accent

#CE41E7

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F2F8B

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

Preview Lab → · Contrast checker → · Palette generator →