#1B397E#1B397E

#1B397E is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.5% C 0.123 H 263.7°. Best body text is #FFFFFF at 10.86:1 contrast (WCAG AA passes).

Color values

HEX	#1B397E
RGB	rgb(27, 57, 126)
HSL	hsl(222, 65%, 30%)
HSV	hsv(222, 79%, 49%)
CMYK	cmyk(78.6%, 54.8%, 0%, 50.6%)
CIE-LAB	lab(25.76, 15.49, -42.33)
CIE-LCH	lch(25.76, 45.07, 290.10°)
OKLab	oklab(36.54% -0.0134 -0.1219)
OKLCH	oklch(36.54% 0.123 263.7)
XYZ	xyz(5.6797, 4.6650, 20.3357)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B397E #7E601B

analogous

#1B6B7E #1B397E #2E1B7E

triadic

#1B397E #7E1B39 #397E1B

tetradic

#1B397E #7E1B6B #7E601B #1B7E2E

square

#1B397E #7E1B6B #7E601B #1B7E2E

split-complementary

#1B397E #7E2E1B #6B7E1B

monochromatic

#050B19 #10224C #1B397E #2650B0 #3E6CD6

Accessibility & contrast

On white

10.86

#1B397E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1B397E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B397E

10.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B397E	#FFFFFF	#000000	##FFFFFF
##1B397E	1.00	10.86	1.93	10.86
#FFFFFF	10.86	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#074280

Deuteranopia (green-blind)

#00397D

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b397e;
/* rgb */ color: rgb(27, 57, 126);
/* oklch */ color: oklch(36.5% 0.123 263.7);

Tailwind

colors: {
  custom: {
    50: '#676ea4',
    500: '#1b397e',
    950: '#000000',
  },
}

SCSS

$custom: #1b397e;
$custom-light: #676ea4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b397e",
  "rgb": {
    "r": 27,
    "g": 57,
    "b": 126
  },
  "hsl": {
    "h": 221.818,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.36543,
    "c": 0.12264,
    "h": 263.7
  },
  "luminance": 0.04666
}

Semantic roles & 50–950 ramp

primary

#1B397E

secondary

#B29043

accent

#B540E8

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B397E

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

Preview Lab → · Contrast checker → · Palette generator →