#1B3E8D#1B3E8D

#1B3E8D is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.9% C 0.138 H 263.4°. Best body text is #FFFFFF at 9.90:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E8D
RGB	rgb(27, 62, 141)
HSL	hsl(222, 68%, 33%)
HSV	hsv(222, 81%, 55%)
CMYK	cmyk(80.9%, 56%, 0%, 44.7%)
CIE-LAB	lab(28.38, 18.09, -47.41)
CIE-LCH	lch(28.38, 50.75, 290.88°)
OKLab	oklab(38.9% -0.0159 -0.1368)
OKLCH	oklch(38.9% 0.138 263.4)
XYZ	xyz(6.9806, 5.6005, 25.9072)
Luminance	0.0560 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E8D #8D6A1B

analogous

#1B778D #1B3E8D #311B8D

triadic

#1B3E8D #8D1B3E #3E8D1B

tetradic

#1B3E8D #8D1B77 #8D6A1B #1B8D31

square

#1B3E8D #8D1B77 #8D6A1B #1B8D31

split-complementary

#1B3E8D #8D311B #778D1B

monochromatic

#071126 #11275A #1B3E8D #2555C0 #4774DC

Accessibility & contrast

On white

9.90

#1B3E8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1B3E8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E8D

9.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E8D	#FFFFFF	#000000	##FFFFFF
##1B3E8D	1.00	9.90	2.12	9.90
#FFFFFF	9.90	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004890

Deuteranopia (green-blind)

#003E8B

Tritanopia (blue-blind)

#00515F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b3e8d;
/* rgb */ color: rgb(27, 62, 141);
/* oklch */ color: oklch(38.9% 0.138 263.4);

Tailwind

colors: {
  custom: {
    50: '#6b72af',
    500: '#1b3e8d',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e8d;
$custom-light: #6b72af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e8d",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 141
  },
  "hsl": {
    "h": 221.579,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.389,
    "c": 0.13768,
    "h": 263.4
  },
  "luminance": 0.05601
}

Semantic roles & 50–950 ramp

primary

#1B3E8D

secondary

#BD9946

accent

#B53DEB

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1B3E8D

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

Preview Lab → · Contrast checker → · Palette generator →