#1F3BAE#1F3BAE

#1F3BAE is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.5% C 0.185 H 266.8°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#1F3BAE
RGB	rgb(31, 59, 174)
HSL	hsl(228, 70%, 40%)
HSV	hsv(228, 82%, 68%)
CMYK	cmyk(82.2%, 66.1%, 0%, 31.8%)
CIE-LAB	lab(30.58, 33.42, -63.85)
CIE-LCH	lch(30.58, 72.06, 297.63°)
OKLab	oklab(41.46% -0.0104 -0.1849)
OKLCH	oklch(41.46% 0.185 266.8)
XYZ	xyz(9.7663, 6.4741, 40.7711)
Luminance	0.0648 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3BAE #AE921F

analogous

#1F82AE #1F3BAE #4B1FAE

triadic

#1F3BAE #AE1F3B #3BAE1F

tetradic

#1F3BAE #AE1F82 #AE921F #1FAE4B

square

#1F3BAE #AE1F82 #AE921F #1FAE4B

split-complementary

#1F3BAE #AE4B1F #82AE1F

monochromatic

#0C1846 #16297A #1F3BAE #3051DA #647DE3

Accessibility & contrast

On white

9.15

#1F3BAE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#1F3BAE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3BAE

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3BAE	#FFFFFF	#000000	##FFFFFF
##1F3BAE	1.00	9.15	2.30	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB2

Deuteranopia (green-blind)

#0041AC

Tritanopia (blue-blind)

#005A6F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f3bae;
/* rgb */ color: rgb(31, 59, 174);
/* oklch */ color: oklch(41.5% 0.185 266.8);

Tailwind

colors: {
  custom: {
    50: '#7571c7',
    500: '#1f3bae',
    950: '#000000',
  },
}

SCSS

$custom: #1f3bae;
$custom-light: #7571c7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3bae",
  "rgb": {
    "r": 31,
    "g": 59,
    "b": 174
  },
  "hsl": {
    "h": 228.252,
    "s": 69.756,
    "l": 40.196
  },
  "oklch": {
    "l": 0.4146,
    "c": 0.18521,
    "h": 266.8
  },
  "luminance": 0.06475
}

Semantic roles & 50–950 ramp

primary

#1F3BAE

secondary

#C8B460

accent

#CA3BED

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1F3BAE

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

Preview Lab → · Contrast checker → · Palette generator →