#1A3DA4#1A3DA4

#1A3DA4 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.7% C 0.171 H 265.0°. Best body text is #FFFFFF at 9.34:1 contrast (WCAG AA passes).

Color values

HEX	#1A3DA4
RGB	rgb(26, 61, 164)
HSL	hsl(225, 73%, 37%)
HSV	hsv(225, 84%, 64%)
CMYK	cmyk(84.1%, 62.8%, 0%, 35.7%)
CIE-LAB	lab(30.00, 27.86, -58.80)
CIE-LCH	lch(30.00, 65.06, 295.35°)
OKLab	oklab(40.71% -0.0149 -0.1702)
OKLCH	oklch(40.71% 0.171 265)
XYZ	xyz(8.7932, 6.2364, 35.8551)
Luminance	0.0624 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3DA4 #A4811A

analogous

#1A82A4 #1A3DA4 #3C1AA4

triadic

#1A3DA4 #A41A3D #3DA41A

tetradic

#1A3DA4 #A41A82 #A4811A #1AA43C

square

#1A3DA4 #A41A82 #A4811A #1AA43C

split-complementary

#1A3DA4 #A43C1A #82A41A

monochromatic

#09163A #12296F #1A3DA4 #2251D9 #5479E4

Accessibility & contrast

On white

9.34

#1A3DA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1A3DA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3DA4

9.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3DA4	#FFFFFF	#000000	##FFFFFF
##1A3DA4	1.00	9.34	2.25	9.34
#FFFFFF	9.34	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA7

Deuteranopia (green-blind)

#0040A2

Tritanopia (blue-blind)

#00586A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1a3da4;
/* rgb */ color: rgb(26, 61, 164);
/* oklch */ color: oklch(40.7% 0.171 265.0);

Tailwind

colors: {
  custom: {
    50: '#7172c0',
    500: '#1a3da4',
    950: '#000000',
  },
}

SCSS

$custom: #1a3da4;
$custom-light: #7172c0;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3da4",
  "rgb": {
    "r": 26,
    "g": 61,
    "b": 164
  },
  "hsl": {
    "h": 224.783,
    "s": 72.632,
    "l": 37.255
  },
  "oklch": {
    "l": 0.40705,
    "c": 0.17087,
    "h": 265
  },
  "luminance": 0.06237
}

Semantic roles & 50–950 ramp

primary

#1A3DA4

secondary

#C7A953

accent

#C138EF

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1A3DA4

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

Preview Lab → · Contrast checker → · Palette generator →