#1F3AA6#1F3AA6

#1F3AA6 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.5% C 0.176 H 266.9°. Best body text is #FFFFFF at 9.48:1 contrast (WCAG AA passes).

Color values

HEX	#1F3AA6
RGB	rgb(31, 58, 166)
HSL	hsl(228, 69%, 39%)
HSV	hsv(228, 81%, 65%)
CMYK	cmyk(81.3%, 65.1%, 0%, 34.9%)
CIE-LAB	lab(29.59, 31.05, -60.67)
CIE-LCH	lch(29.59, 68.16, 297.10°)
OKLab	oklab(40.51% -0.0096 -0.1757)
OKLCH	oklch(40.51% 0.176 266.9)
XYZ	xyz(8.9587, 6.0695, 36.7684)
Luminance	0.0607 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3AA6 #A68B1F

analogous

#1F7DA6 #1F3AA6 #471FA6

triadic

#1F3AA6 #A61F3A #3AA61F

tetradic

#1F3AA6 #A61F7D #A68B1F #1FA647

square

#1F3AA6 #A61F7D #A68B1F #1FA647

split-complementary

#1F3AA6 #A6471F #7DA61F

monochromatic

#0C163F #152872 #1F3AA6 #2B4DD7 #5E79E1

Accessibility & contrast

On white

9.48

#1F3AA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1F3AA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3AA6

9.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3AA6	#FFFFFF	#000000	##FFFFFF
##1F3AA6	1.00	9.48	2.21	9.48
#FFFFFF	9.48	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA9

Deuteranopia (green-blind)

#003FA4

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f3aa6;
/* rgb */ color: rgb(31, 58, 166);
/* oklch */ color: oklch(40.5% 0.176 266.9);

Tailwind

colors: {
  custom: {
    50: '#7370c1',
    500: '#1f3aa6',
    950: '#000000',
  },
}

SCSS

$custom: #1f3aa6;
$custom-light: #7370c1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3aa6",
  "rgb": {
    "r": 31,
    "g": 58,
    "b": 166
  },
  "hsl": {
    "h": 228,
    "s": 68.528,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40505,
    "c": 0.17592,
    "h": 266.9
  },
  "luminance": 0.06071
}

Semantic roles & 50–950 ramp

primary

#1F3AA6

secondary

#C5B05B

accent

#C83CEB

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #1F3AA6

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

Preview Lab → · Contrast checker → · Palette generator →