#1B3BA0#1B3BA0

#1B3BA0 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.0% C 0.168 H 265.5°. Best body text is #FFFFFF at 9.63:1 contrast (WCAG AA passes).

Color values

HEX	#1B3BA0
RGB	rgb(27, 59, 160)
HSL	hsl(226, 71%, 37%)
HSV	hsv(226, 83%, 63%)
CMYK	cmyk(83.1%, 63.1%, 0%, 37.3%)
CIE-LAB	lab(29.15, 27.72, -57.77)
CIE-LCH	lch(29.15, 64.08, 295.64°)
OKLab	oklab(39.98% -0.0132 -0.1672)
OKLCH	oklch(39.98% 0.168 265.5)
XYZ	xyz(8.3589, 5.8980, 33.9488)
Luminance	0.0590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3BA0 #A0801B

analogous

#1B7EA0 #1B3BA0 #3E1BA0

triadic

#1B3BA0 #A01B3B #3BA01B

tetradic

#1B3BA0 #A01B7E #A0801B #1BA03E

square

#1B3BA0 #A01B7E #A0801B #1BA03E

split-complementary

#1B3BA0 #A03E1B #7EA01B

monochromatic

#091437 #12286C #1B3BA0 #244ED4 #5376E2

Accessibility & contrast

On white

9.63

#1B3BA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1B3BA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3BA0

9.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3BA0	#FFFFFF	#000000	##FFFFFF
##1B3BA0	1.00	9.63	2.18	9.63
#FFFFFF	9.63	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA3

Deuteranopia (green-blind)

#003F9E

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b3ba0;
/* rgb */ color: rgb(27, 59, 160);
/* oklch */ color: oklch(40.0% 0.168 265.5);

Tailwind

colors: {
  custom: {
    50: '#7070bd',
    500: '#1b3ba0',
    950: '#000000',
  },
}

SCSS

$custom: #1b3ba0;
$custom-light: #7070bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3ba0",
  "rgb": {
    "r": 27,
    "g": 59,
    "b": 160
  },
  "hsl": {
    "h": 225.564,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.39976,
    "c": 0.16772,
    "h": 265.5
  },
  "luminance": 0.05899
}

Semantic roles & 50–950 ramp

primary

#1B3BA0

secondary

#C5A952

accent

#C33AEE

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B3BA0

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

Preview Lab → · Contrast checker → · Palette generator →