#1A3181#1A3181

#1A3181 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.0% C 0.138 H 266.7°. Best body text is #FFFFFF at 11.67:1 contrast (WCAG AA passes).

Color values

HEX	#1A3181
RGB	rgb(26, 49, 129)
HSL	hsl(227, 66%, 30%)
HSV	hsv(227, 80%, 51%)
CMYK	cmyk(79.8%, 62%, 0%, 49.4%)
CIE-LAB	lab(23.67, 22.22, -47.60)
CIE-LCH	lch(23.67, 52.53, 295.02°)
OKLab	oklab(35.04% -0.008 -0.1376)
OKLCH	oklch(35.04% 0.138 266.7)
XYZ	xyz(5.4854, 4.0006, 21.2477)
Luminance	0.0400 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3181 #816A1A

analogous

#1A6481 #1A3181 #361A81

triadic

#1A3181 #811A31 #31811A

tetradic

#1A3181 #811A64 #816A1A #1A8136

square

#1A3181 #811A64 #816A1A #1A8136

split-complementary

#1A3181 #81361A #64811A

monochromatic

#050A1B #101E4E #1A3181 #2444B4 #3D60D8

Accessibility & contrast

On white

11.67

#1A3181 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1A3181 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3181

11.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3181	#FFFFFF	#000000	##FFFFFF
##1A3181	1.00	11.67	1.80	11.67
#FFFFFF	11.67	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D84

Deuteranopia (green-blind)

#00347F

Tritanopia (blue-blind)

#004554

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1a3181;
/* rgb */ color: rgb(26, 49, 129);
/* oklch */ color: oklch(35.0% 0.138 266.7);

Tailwind

colors: {
  custom: {
    50: '#6868a6',
    500: '#1a3181',
    950: '#000000',
  },
}

SCSS

$custom: #1a3181;
$custom-light: #6868a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3181",
  "rgb": {
    "r": 26,
    "g": 49,
    "b": 129
  },
  "hsl": {
    "h": 226.602,
    "s": 66.452,
    "l": 30.392
  },
  "oklch": {
    "l": 0.35041,
    "c": 0.1378,
    "h": 266.7
  },
  "luminance": 0.04001
}

Semantic roles & 50–950 ramp

primary

#1A3181

secondary

#B59B42

accent

#C33EE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1A3181

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

Preview Lab → · Contrast checker → · Palette generator →