#1B398E#1B398E

#1B398E is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.9% C 0.146 H 265.2°. Best body text is #FFFFFF at 10.38:1 contrast (WCAG AA passes).

Color values

HEX	#1B398E
RGB	rgb(27, 57, 142)
HSL	hsl(224, 68%, 33%)
HSV	hsv(224, 81%, 56%)
CMYK	cmyk(81%, 59.9%, 0%, 44.3%)
CIE-LAB	lab(27.05, 21.97, -50.20)
CIE-LCH	lch(27.05, 54.79, 293.63°)
OKLab	oklab(37.92% -0.0123 -0.145)
OKLCH	oklch(37.92% 0.146 265.2)
XYZ	xyz(6.7959, 5.1115, 26.2144)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B398E #8E701B

analogous

#1B728E #1B398E #371B8E

triadic

#1B398E #8E1B39 #398E1B

tetradic

#1B398E #8E1B72 #8E701B #1B8E37

square

#1B398E #8E1B72 #8E701B #1B8E37

split-complementary

#1B398E #8E371B #728E1B

monochromatic

#071027 #11245B #1B398E #254EC1 #476EDC

Accessibility & contrast

On white

10.38

#1B398E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1B398E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B398E

10.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B398E	#FFFFFF	#000000	##FFFFFF
##1B398E	1.00	10.38	2.02	10.38
#FFFFFF	10.38	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004591

Deuteranopia (green-blind)

#003B8C

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b398e;
/* rgb */ color: rgb(27, 57, 142);
/* oklch */ color: oklch(37.9% 0.146 265.2);

Tailwind

colors: {
  custom: {
    50: '#6c6eb0',
    500: '#1b398e',
    950: '#000000',
  },
}

SCSS

$custom: #1b398e;
$custom-light: #6c6eb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b398e",
  "rgb": {
    "r": 27,
    "g": 57,
    "b": 142
  },
  "hsl": {
    "h": 224.348,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.37923,
    "c": 0.14555,
    "h": 265.2
  },
  "luminance": 0.05112
}

Semantic roles & 50–950 ramp

primary

#1B398E

secondary

#BE9F47

accent

#BE3DEB

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1B398E

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

Preview Lab → · Contrast checker → · Palette generator →