#1B3EAA#1B3EAA

#1B3EAA is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.5% C 0.177 H 265.2°. Best body text is #FFFFFF at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#1B3EAA
RGB	rgb(27, 62, 170)
HSL	hsl(225, 73%, 39%)
HSV	hsv(225, 84%, 67%)
CMYK	cmyk(84.1%, 63.5%, 0%, 33.3%)
CIE-LAB	lab(30.83, 29.60, -61.05)
CIE-LCH	lch(30.83, 67.84, 295.87°)
OKLab	oklab(41.49% -0.0148 -0.1768)
OKLCH	oklch(41.49% 0.177 265.2)
XYZ	xyz(9.4278, 6.5794, 38.7955)
Luminance	0.0658 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3EAA #AA871B

analogous

#1B85AA #1B3EAA #3F1BAA

triadic

#1B3EAA #AA1B3E #3EAA1B

tetradic

#1B3EAA #AA1B85 #AA871B #1BAA3F

square

#1B3EAA #AA1B85 #AA871B #1BAA3F

split-complementary

#1B3EAA #AA3F1B #85AA1B

monochromatic

#0A1740 #132B75 #1B3EAA #2652DC #5B7CE5

Accessibility & contrast

On white

9.07

#1B3EAA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#1B3EAA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3EAA

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3EAA	#FFFFFF	#000000	##FFFFFF
##1B3EAA	1.00	9.07	2.32	9.07
#FFFFFF	9.07	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAD

Deuteranopia (green-blind)

#0042A8

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b3eaa;
/* rgb */ color: rgb(27, 62, 170);
/* oklch */ color: oklch(41.5% 0.177 265.2);

Tailwind

colors: {
  custom: {
    50: '#7373c4',
    500: '#1b3eaa',
    950: '#000000',
  },
}

SCSS

$custom: #1b3eaa;
$custom-light: #7373c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3eaa",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 170
  },
  "hsl": {
    "h": 225.315,
    "s": 72.589,
    "l": 38.627
  },
  "oklch": {
    "l": 0.41494,
    "c": 0.17739,
    "h": 265.2
  },
  "luminance": 0.06581
}

Semantic roles & 50–950 ramp

primary

#1B3EAA

secondary

#C9AD58

accent

#C339EF

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B3EAA

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

Preview Lab → · Contrast checker → · Palette generator →