#1837A0#1837A0

#1837A0 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.1% C 0.173 H 265.6°. Best body text is #FFFFFF at 10.03:1 contrast (WCAG AA passes).

Color values

HEX	#1837A0
RGB	rgb(24, 55, 160)
HSL	hsl(226, 74%, 36%)
HSV	hsv(226, 85%, 63%)
CMYK	cmyk(85%, 65.6%, 0%, 37.3%)
CIE-LAB	lab(28.02, 30.18, -59.63)
CIE-LCH	lch(28.02, 66.83, 296.84°)
OKLab	oklab(39.11% -0.0132 -0.1728)
OKLCH	oklch(39.11% 0.173 265.6)
XYZ	xyz(8.0858, 5.4636, 33.8793)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1837A0 #A08118

analogous

#187BA0 #1837A0 #3D18A0

triadic

#1837A0 #A01837 #37A018

tetradic

#1837A0 #A0187B #A08118 #18A03D

square

#1837A0 #A0187B #A08118 #18A03D

split-complementary

#1837A0 #A03D18 #7BA018

monochromatic

#081236 #10256B #1837A0 #2049D5 #4E70E4

Accessibility & contrast

On white

10.03

#1837A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1837A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1837A0

10.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1837A0	#FFFFFF	#000000	##FFFFFF
##1837A0	1.00	10.03	2.09	10.03
#FFFFFF	10.03	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049A3

Deuteranopia (green-blind)

#003C9E

Tritanopia (blue-blind)

#005366

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1837a0;
/* rgb */ color: rgb(24, 55, 160);
/* oklch */ color: oklch(39.1% 0.173 265.6);

Tailwind

colors: {
  custom: {
    50: '#706dbd',
    500: '#1837a0',
    950: '#000000',
  },
}

SCSS

$custom: #1837a0;
$custom-light: #706dbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1837a0",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 160
  },
  "hsl": {
    "h": 226.324,
    "s": 73.913,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39107,
    "c": 0.17327,
    "h": 265.6
  },
  "luminance": 0.05465
}

Semantic roles & 50–950 ramp

primary

#1837A0

secondary

#C6AB4D

accent

#C637F1

background

#F7F6FB

surface

#EDEBF7

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1837A0

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

Preview Lab → · Contrast checker → · Palette generator →