#1A237E#1A237E

#1A237E is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.1% C 0.151 H 270.3°. Best body text is #FFFFFF at 13.24:1 contrast (WCAG AA passes).

Color values

HEX	#1A237E
RGB	rgb(26, 35, 126)
HSL	hsl(235, 66%, 30%)
HSV	hsv(235, 79%, 49%)
CMYK	cmyk(79.4%, 72.2%, 0%, 50.6%)
CIE-LAB	lab(19.75, 30.61, -52.14)
CIE-LCH	lch(19.75, 60.46, 300.41°)
OKLab	oklab(32.07% 0.0008 -0.1509)
OKLCH	oklch(32.07% 0.151 270.3)
XYZ	xyz(4.7916, 2.9275, 20.0471)
Luminance	0.0293 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A237E #7E751A

analogous

#1A557E #1A237E #431A7E

triadic

#1A237E #7E1A23 #237E1A

tetradic

#1A237E #7E1A55 #7E751A #1A7E43

square

#1A237E #7E1A55 #7E751A #1A7E43

split-complementary

#1A237E #7E431A #557E1A

monochromatic

#050719 #10154B #1A237E #2431B1 #3C4AD7

Accessibility & contrast

On white

13.24

#1A237E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1A237E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A237E

13.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A237E	#FFFFFF	#000000	##FFFFFF
##1A237E	1.00	13.24	1.59	13.24
#FFFFFF	13.24	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003581

Deuteranopia (green-blind)

#002B7C

Tritanopia (blue-blind)

#003C4D

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1a237e;
/* rgb */ color: rgb(26, 35, 126);
/* oklch */ color: oklch(32.1% 0.151 270.3);

Tailwind

colors: {
  custom: {
    50: '#695ea4',
    500: '#1a237e',
    950: '#000000',
  },
}

SCSS

$custom: #1a237e;
$custom-light: #695ea4;
$custom-dark: #000000;

JSON

{
  "hex": "#1a237e",
  "rgb": {
    "r": 26,
    "g": 35,
    "b": 126
  },
  "hsl": {
    "h": 234.6,
    "s": 65.789,
    "l": 29.804
  },
  "oklch": {
    "l": 0.32075,
    "c": 0.15094,
    "h": 270.3
  },
  "luminance": 0.02928
}

Semantic roles & 50–950 ramp

primary

#1A237E

secondary

#B2A842

accent

#D93FE9

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1A237E

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

Preview Lab → · Contrast checker → · Palette generator →