#1A3F9B#1A3F9B

#1A3F9B is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.3% C 0.156 H 264.0°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#1A3F9B
RGB	rgb(26, 63, 155)
HSL	hsl(223, 71%, 35%)
HSV	hsv(223, 83%, 61%)
CMYK	cmyk(83.2%, 59.4%, 0%, 39.2%)
CIE-LAB	lab(29.76, 22.94, -53.74)
CIE-LCH	lch(29.76, 58.43, 293.11°)
OKLab	oklab(40.29% -0.0164 -0.1553)
OKLCH	oklch(40.29% 0.156 264)
XYZ	xyz(8.1178, 6.1402, 31.7613)
Luminance	0.0614 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3F9B #9B761A

analogous

#1A7F9B #1A3F9B #361A9B

triadic

#1A3F9B #9B1A3F #3F9B1A

tetradic

#1A3F9B #9B1A7F #9B761A #1A9B36

square

#1A3F9B #9B1A7F #9B761A #1A9B36

split-complementary

#1A3F9B #9B361A #7F9B1A

monochromatic

#081432 #112A67 #1A3F9B #2354CF #4E78E1

Accessibility & contrast

On white

9.42

#1A3F9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#1A3F9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3F9B

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3F9B	#FFFFFF	#000000	##FFFFFF
##1A3F9B	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9E

Deuteranopia (green-blind)

#004099

Tritanopia (blue-blind)

#005666

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1a3f9b;
/* rgb */ color: rgb(26, 63, 155);
/* oklch */ color: oklch(40.3% 0.156 264.0);

Tailwind

colors: {
  custom: {
    50: '#6e73b9',
    500: '#1a3f9b',
    950: '#000000',
  },
}

SCSS

$custom: #1a3f9b;
$custom-light: #6e73b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3f9b",
  "rgb": {
    "r": 26,
    "g": 63,
    "b": 155
  },
  "hsl": {
    "h": 222.791,
    "s": 71.271,
    "l": 35.49
  },
  "oklch": {
    "l": 0.40288,
    "c": 0.15621,
    "h": 264
  },
  "luminance": 0.06141
}

Semantic roles & 50–950 ramp

primary

#1A3F9B

secondary

#C4A24D

accent

#BA3AEE

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1A3F9B

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

Preview Lab → · Contrast checker → · Palette generator →