#1B3993#1B3993

#1B3993 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.4% C 0.153 H 265.4°. Best body text is #FFFFFF at 10.23:1 contrast (WCAG AA passes).

Color values

HEX	#1B3993
RGB	rgb(27, 57, 147)
HSL	hsl(225, 69%, 34%)
HSV	hsv(225, 82%, 58%)
CMYK	cmyk(81.6%, 61.2%, 0%, 42.4%)
CIE-LAB	lab(27.48, 23.96, -52.58)
CIE-LCH	lch(27.48, 57.78, 294.50°)
OKLab	oklab(38.38% -0.0121 -0.152)
OKLCH	oklch(38.38% 0.153 265.4)
XYZ	xyz(7.1797, 5.2650, 28.2360)
Luminance	0.0527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3993 #93751B

analogous

#1B7593 #1B3993 #391B93

triadic

#1B3993 #931B39 #39931B

tetradic

#1B3993 #931B75 #93751B #1B9339

square

#1B3993 #931B75 #93751B #1B9339

split-complementary

#1B3993 #93391B #75931B

monochromatic

#08112C #12255F #1B3993 #244DC7 #4B6FDE

Accessibility & contrast

On white

10.23

#1B3993 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#1B3993 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3993

10.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3993	#FFFFFF	#000000	##FFFFFF
##1B3993	1.00	10.23	2.05	10.23
#FFFFFF	10.23	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004796

Deuteranopia (green-blind)

#003B91

Tritanopia (blue-blind)

#005060

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b3993;
/* rgb */ color: rgb(27, 57, 147);
/* oklch */ color: oklch(38.4% 0.153 265.4);

Tailwind

colors: {
  custom: {
    50: '#6d6fb3',
    500: '#1b3993',
    950: '#000000',
  },
}

SCSS

$custom: #1b3993;
$custom-light: #6d6fb3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3993",
  "rgb": {
    "r": 27,
    "g": 57,
    "b": 147
  },
  "hsl": {
    "h": 225,
    "s": 68.966,
    "l": 34.118
  },
  "oklch": {
    "l": 0.38375,
    "c": 0.15251,
    "h": 265.4
  },
  "luminance": 0.05266
}

Semantic roles & 50–950 ramp

primary

#1B3993

secondary

#C0A24A

accent

#C03CEC

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1B3993

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

Preview Lab → · Contrast checker → · Palette generator →