#1A237C#1A237C

#1A237C is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.9% C 0.148 H 270.4°. Best body text is #FFFFFF at 13.33:1 contrast (WCAG AA passes).

Color values

HEX	#1A237C
RGB	rgb(26, 35, 124)
HSL	hsl(234, 65%, 29%)
HSV	hsv(234, 79%, 49%)
CMYK	cmyk(79%, 71.8%, 0%, 51.4%)
CIE-LAB	lab(19.54, 29.85, -51.21)
CIE-LCH	lch(19.54, 59.28, 300.24°)
OKLab	oklab(31.86% 0.001 -0.1482)
OKLCH	oklch(31.86% 0.148 270.4)
XYZ	xyz(4.6639, 2.8764, 19.3743)
Luminance	0.0288 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A237C #7C731A

analogous

#1A547C #1A237C #421A7C

triadic

#1A237C #7C1A23 #237C1A

tetradic

#1A237C #7C1A54 #7C731A #1A7C42

square

#1A237C #7C1A54 #7C731A #1A7C42

split-complementary

#1A237C #7C421A #547C1A

monochromatic

#050719 #0F1549 #1A237C #2531AF #3B49D6

Accessibility & contrast

On white

13.33

#1A237C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1A237C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A237C

13.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A237C	#FFFFFF	#000000	##FFFFFF
##1A237C	1.00	13.33	1.58	13.33
#FFFFFF	13.33	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347F

Deuteranopia (green-blind)

#002B7A

Tritanopia (blue-blind)

#003C4C

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1a237c;
/* rgb */ color: rgb(26, 35, 124);
/* oklch */ color: oklch(31.9% 0.148 270.4);

Tailwind

colors: {
  custom: {
    50: '#685ea3',
    500: '#1a237c',
    950: '#000000',
  },
}

SCSS

$custom: #1a237c;
$custom-light: #685ea3;
$custom-dark: #000000;

JSON

{
  "hex": "#1a237c",
  "rgb": {
    "r": 26,
    "g": 35,
    "b": 124
  },
  "hsl": {
    "h": 234.49,
    "s": 65.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.3186,
    "c": 0.14824,
    "h": 270.4
  },
  "luminance": 0.02877
}

Semantic roles & 50–950 ramp

primary

#1A237C

secondary

#B0A642

accent

#D940E8

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1A237C

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

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