#1B3D88#1B3D88

#1B3D88 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.3% C 0.132 H 263.2°. Best body text is #FFFFFF at 10.15:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D88
RGB	rgb(27, 61, 136)
HSL	hsl(221, 67%, 32%)
HSV	hsv(221, 80%, 53%)
CMYK	cmyk(80.1%, 55.1%, 0%, 46.7%)
CIE-LAB	lab(27.70, 16.76, -45.42)
CIE-LCH	lch(27.70, 48.41, 290.25°)
OKLab	oklab(38.26% -0.0156 -0.1309)
OKLCH	oklch(38.26% 0.132 263.2)
XYZ	xyz(6.5631, 5.3473, 23.9740)
Luminance	0.0535 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D88 #88661B

analogous

#1B7488 #1B3D88 #2F1B88

triadic

#1B3D88 #881B3D #3D881B

tetradic

#1B3D88 #881B74 #88661B #1B882F

square

#1B3D88 #881B74 #88661B #1B882F

split-complementary

#1B3D88 #882F1B #74881B

monochromatic

#070F22 #112655 #1B3D88 #2554BB #4472DA

Accessibility & contrast

On white

10.15

#1B3D88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1B3D88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D88

10.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D88	#FFFFFF	#000000	##FFFFFF
##1B3D88	1.00	10.15	2.07	10.15
#FFFFFF	10.15	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01478B

Deuteranopia (green-blind)

#003D87

Tritanopia (blue-blind)

#004F5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b3d88;
/* rgb */ color: rgb(27, 61, 136);
/* oklch */ color: oklch(38.3% 0.132 263.2);

Tailwind

colors: {
  custom: {
    50: '#6a71ab',
    500: '#1b3d88',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d88;
$custom-light: #6a71ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d88",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 136
  },
  "hsl": {
    "h": 221.284,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.38263,
    "c": 0.13186,
    "h": 263.2
  },
  "luminance": 0.05348
}

Semantic roles & 50–950 ramp

primary

#1B3D88

secondary

#BB9644

accent

#B43EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3D88

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

Preview Lab → · Contrast checker → · Palette generator →