#1B236B#1B236B

#1B236B is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.2% C 0.124 H 271.7°. Best body text is #FFFFFF at 14.01:1 contrast (WCAG AA passes).

Color values

HEX	#1B236B
RGB	rgb(27, 35, 107)
HSL	hsl(234, 60%, 26%)
HSV	hsv(234, 75%, 42%)
CMYK	cmyk(74.8%, 67.3%, 0%, 58%)
CIE-LAB	lab(17.90, 23.42, -42.96)
CIE-LCH	lch(17.90, 48.93, 298.60°)
OKLab	oklab(30.16% 0.0037 -0.1241)
OKLCH	oklch(30.16% 0.124 271.7)
XYZ	xyz(3.7060, 2.4962, 14.1936)
Luminance	0.0250 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B236B #6B631B

analogous

#1B4B6B #1B236B #3B1B6B

triadic

#1B236B #6B1B23 #236B1B

tetradic

#1B236B #6B1B4B #6B631B #1B6B3B

square

#1B236B #6B1B4B #6B631B #1B6B3B

split-complementary

#1B236B #6B3B1B #4B6B1B

monochromatic

#060818 #0F133A #1B236B #27339C #3544CC

Accessibility & contrast

On white

14.01

#1B236B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#1B236B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B236B

14.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B236B	#FFFFFF	#000000	##FFFFFF
##1B236B	1.00	14.01	1.50	14.01
#FFFFFF	14.01	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	14.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00306D

Deuteranopia (green-blind)

#00286A

Tritanopia (blue-blind)

#003643

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b236b;
/* rgb */ color: rgb(27, 35, 107);
/* oklch */ color: oklch(30.2% 0.124 271.7);

Tailwind

colors: {
  custom: {
    50: '#645e96',
    500: '#1b236b',
    950: '#000000',
  },
}

SCSS

$custom: #1b236b;
$custom-light: #645e96;
$custom-dark: #000000;

JSON

{
  "hex": "#1b236b",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 107
  },
  "hsl": {
    "h": 234,
    "s": 59.701,
    "l": 26.275
  },
  "oklch": {
    "l": 0.30164,
    "c": 0.12413,
    "h": 271.7
  },
  "luminance": 0.02497
}

Semantic roles & 50–950 ramp

primary

#1B236B

secondary

#A09742

accent

#D345E3

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040D

muted

#7A797E

Preview Lab

Preview with #1B236B

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

Preview Lab → · Contrast checker → · Palette generator →