#1B237D#1B237D

#1B237D is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.0% C 0.149 H 270.8°. Best body text is #FFFFFF at 13.26:1 contrast (WCAG AA passes).

Color values

HEX	#1B237D
RGB	rgb(27, 35, 125)
HSL	hsl(235, 64%, 30%)
HSV	hsv(235, 78%, 49%)
CMYK	cmyk(78.4%, 72%, 0%, 51%)
CIE-LAB	lab(19.70, 30.33, -51.58)
CIE-LCH	lch(19.70, 59.84, 300.46°)
OKLab	oklab(32.02% 0.002 -0.1493)
OKLCH	oklch(32.02% 0.149 270.8)
XYZ	xyz(4.7534, 2.9152, 19.7102)
Luminance	0.0292 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B237D #7D751B

analogous

#1B547D #1B237D #441B7D

triadic

#1B237D #7D1B23 #237D1B

tetradic

#1B237D #7D1B54 #7D751B #1B7D44

square

#1B237D #7D1B54 #7D751B #1B7D44

split-complementary

#1B237D #7D441B #547D1B

monochromatic

#050719 #10154B #1B237D #2631AF #3D4AD5

Accessibility & contrast

On white

13.26

#1B237D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1B237D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B237D

13.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B237D	#FFFFFF	#000000	##FFFFFF
##1B237D	1.00	13.26	1.58	13.26
#FFFFFF	13.26	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003480

Deuteranopia (green-blind)

#002B7B

Tritanopia (blue-blind)

#003C4D

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b237d;
/* rgb */ color: rgb(27, 35, 125);
/* oklch */ color: oklch(32.0% 0.149 270.8);

Tailwind

colors: {
  custom: {
    50: '#695ea4',
    500: '#1b237d',
    950: '#000000',
  },
}

SCSS

$custom: #1b237d;
$custom-light: #695ea4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b237d",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 125
  },
  "hsl": {
    "h": 235.102,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.32022,
    "c": 0.14931,
    "h": 270.8
  },
  "luminance": 0.02916
}

Semantic roles & 50–950 ramp

primary

#1B237D

secondary

#B1A843

accent

#DA40E7

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B237D

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

Preview Lab → · Contrast checker → · Palette generator →