#1A3F8F#1A3F8F

#1A3F8F is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.3% C 0.140 H 262.9°. Best body text is #FFFFFF at 9.76:1 contrast (WCAG AA passes).

Color values

HEX	#1A3F8F
RGB	rgb(26, 63, 143)
HSL	hsl(221, 69%, 33%)
HSV	hsv(221, 82%, 56%)
CMYK	cmyk(81.8%, 55.9%, 0%, 43.9%)
CIE-LAB	lab(28.79, 18.10, -47.98)
CIE-LCH	lch(28.79, 51.28, 290.67°)
OKLab	oklab(39.25% -0.0172 -0.1384)
OKLCH	oklch(39.25% 0.14 262.9)
XYZ	xyz(7.1597, 5.7569, 26.7151)
Luminance	0.0576 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3F8F #8F6A1A

analogous

#1A798F #1A3F8F #301A8F

triadic

#1A3F8F #8F1A3F #3F8F1A

tetradic

#1A3F8F #8F1A79 #8F6A1A #1A8F30

square

#1A3F8F #8F1A79 #8F6A1A #1A8F30

split-complementary

#1A3F8F #8F301A #798F1A

monochromatic

#071127 #11285B #1A3F8F #2356C3 #4676DD

Accessibility & contrast

On white

9.76

#1A3F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1A3F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3F8F

9.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3F8F	#FFFFFF	#000000	##FFFFFF
##1A3F8F	1.00	9.76	2.15	9.76
#FFFFFF	9.76	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#003F8D

Tritanopia (blue-blind)

#005360

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1a3f8f;
/* rgb */ color: rgb(26, 63, 143);
/* oklch */ color: oklch(39.3% 0.140 262.9);

Tailwind

colors: {
  custom: {
    50: '#6b73b0',
    500: '#1a3f8f',
    950: '#000000',
  },
}

SCSS

$custom: #1a3f8f;
$custom-light: #6b73b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3f8f",
  "rgb": {
    "r": 26,
    "g": 63,
    "b": 143
  },
  "hsl": {
    "h": 221.026,
    "s": 69.231,
    "l": 33.137
  },
  "oklch": {
    "l": 0.3925,
    "c": 0.1395,
    "h": 262.9
  },
  "luminance": 0.05758
}

Semantic roles & 50–950 ramp

primary

#1A3F8F

secondary

#BF9946

accent

#B43CEC

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1A3F8F

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

Preview Lab → · Contrast checker → · Palette generator →