#1A3F9F#1A3F9F

#1A3F9F is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.6% C 0.162 H 264.3°. Best body text is #FFFFFF at 9.31:1 contrast (WCAG AA passes).

Color values

HEX	#1A3F9F
RGB	rgb(26, 63, 159)
HSL	hsl(223, 72%, 36%)
HSV	hsv(223, 84%, 62%)
CMYK	cmyk(83.6%, 60.4%, 0%, 37.6%)
CIE-LAB	lab(30.10, 24.53, -55.62)
CIE-LCH	lch(30.10, 60.78, 293.80°)
OKLab	oklab(40.64% -0.0162 -0.1608)
OKLCH	oklch(40.64% 0.162 264.3)
XYZ	xyz(8.4593, 6.2768, 33.5599)
Luminance	0.0628 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3F9F #9F7A1A

analogous

#1A829F #1A3F9F #381A9F

triadic

#1A3F9F #9F1A3F #3F9F1A

tetradic

#1A3F9F #9F1A82 #9F7A1A #1A9F38

square

#1A3F9F #9F1A82 #9F7A1A #1A9F38

split-complementary

#1A3F9F #9F381A #829F1A

monochromatic

#091536 #112A6A #1A3F9F #2354D4 #5179E3

Accessibility & contrast

On white

9.31

#1A3F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1A3F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3F9F

9.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3F9F	#FFFFFF	#000000	##FFFFFF
##1A3F9F	1.00	9.31	2.26	9.31
#FFFFFF	9.31	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA2

Deuteranopia (green-blind)

#00419D

Tritanopia (blue-blind)

#005868

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1a3f9f;
/* rgb */ color: rgb(26, 63, 159);
/* oklch */ color: oklch(40.6% 0.162 264.3);

Tailwind

colors: {
  custom: {
    50: '#6f73bc',
    500: '#1a3f9f',
    950: '#000000',
  },
}

SCSS

$custom: #1a3f9f;
$custom-light: #6f73bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3f9f",
  "rgb": {
    "r": 26,
    "g": 63,
    "b": 159
  },
  "hsl": {
    "h": 223.308,
    "s": 71.892,
    "l": 36.275
  },
  "oklch": {
    "l": 0.40645,
    "c": 0.16166,
    "h": 264.3
  },
  "luminance": 0.06278
}

Semantic roles & 50–950 ramp

primary

#1A3F9F

secondary

#C5A450

accent

#BC39EF

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1A3F9F

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

Preview Lab → · Contrast checker → · Palette generator →