#1A3FA1#1A3FA1

#1A3FA1 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.8% C 0.164 H 264.4°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#1A3FA1
RGB	rgb(26, 63, 161)
HSL	hsl(224, 72%, 37%)
HSV	hsv(224, 84%, 63%)
CMYK	cmyk(83.9%, 60.9%, 0%, 36.9%)
CIE-LAB	lab(30.27, 25.32, -56.55)
CIE-LCH	lch(30.27, 61.96, 294.12°)
OKLab	oklab(40.83% -0.0161 -0.1636)
OKLCH	oklch(40.83% 0.164 264.4)
XYZ	xyz(8.6342, 6.3468, 34.4813)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3FA1 #A17C1A

analogous

#1A83A1 #1A3FA1 #391AA1

triadic

#1A3FA1 #A11A3F #3FA11A

tetradic

#1A3FA1 #A11A83 #A17C1A #1AA139

square

#1A3FA1 #A11A83 #A17C1A #1AA139

split-complementary

#1A3FA1 #A1391A #83A11A

monochromatic

#091638 #112A6C #1A3FA1 #2354D6 #527AE3

Accessibility & contrast

On white

9.25

#1A3FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1A3FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3FA1

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3FA1	#FFFFFF	#000000	##FFFFFF
##1A3FA1	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA4

Deuteranopia (green-blind)

#00419F

Tritanopia (blue-blind)

#00586A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1a3fa1;
/* rgb */ color: rgb(26, 63, 161);
/* oklch */ color: oklch(40.8% 0.164 264.4);

Tailwind

colors: {
  custom: {
    50: '#7073be',
    500: '#1a3fa1',
    950: '#000000',
  },
}

SCSS

$custom: #1a3fa1;
$custom-light: #7073be;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3fa1",
  "rgb": {
    "r": 26,
    "g": 63,
    "b": 161
  },
  "hsl": {
    "h": 223.556,
    "s": 72.193,
    "l": 36.667
  },
  "oklch": {
    "l": 0.40825,
    "c": 0.16437,
    "h": 264.4
  },
  "luminance": 0.06348
}

Semantic roles & 50–950 ramp

primary

#1A3FA1

secondary

#C6A651

accent

#BD39EF

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1A3FA1

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

Preview Lab → · Contrast checker → · Palette generator →