#1B3595#1B3595

#1B3595 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.8% C 0.160 H 266.5°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).

Color values

HEX	#1B3595
RGB	rgb(27, 53, 149)
HSL	hsl(227, 69%, 35%)
HSV	hsv(227, 82%, 58%)
CMYK	cmyk(81.9%, 64.4%, 0%, 41.6%)
CIE-LAB	lab(26.59, 27.49, -55.26)
CIE-LCH	lch(26.59, 61.72, 296.44°)
OKLab	oklab(37.77% -0.0097 -0.1599)
OKLCH	oklch(37.77% 0.16 266.5)
XYZ	xyz(7.1480, 4.9483, 29.0063)
Luminance	0.0495 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3595 #957B1B

analogous

#1B7295 #1B3595 #3E1B95

triadic

#1B3595 #951B35 #35951B

tetradic

#1B3595 #951B72 #957B1B #1B953E

square

#1B3595 #951B72 #957B1B #1B953E

split-complementary

#1B3595 #953E1B #72951B

monochromatic

#08102D #122361 #1B3595 #2447C9 #4C6BDF

Accessibility & contrast

On white

10.55

#1B3595 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1B3595 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3595

10.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3595	#FFFFFF	#000000	##FFFFFF
##1B3595	1.00	10.55	1.99	10.55
#FFFFFF	10.55	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004598

Deuteranopia (green-blind)

#003993

Tritanopia (blue-blind)

#004E60

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b3595;
/* rgb */ color: rgb(27, 53, 149);
/* oklch */ color: oklch(37.8% 0.160 266.5);

Tailwind

colors: {
  custom: {
    50: '#6e6cb5',
    500: '#1b3595',
    950: '#000000',
  },
}

SCSS

$custom: #1b3595;
$custom-light: #6e6cb5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3595",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 149
  },
  "hsl": {
    "h": 227.213,
    "s": 69.318,
    "l": 34.51
  },
  "oklch": {
    "l": 0.3777,
    "c": 0.16023,
    "h": 266.5
  },
  "luminance": 0.04949
}

Semantic roles & 50–950 ramp

primary

#1B3595

secondary

#C1A84B

accent

#C73CEC

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1B3595

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

Preview Lab → · Contrast checker → · Palette generator →