#1B397C#1B397C

#1B397C is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.4% C 0.120 H 263.5°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).

Color values

HEX	#1B397C
RGB	rgb(27, 57, 124)
HSL	hsl(221, 64%, 30%)
HSV	hsv(221, 78%, 49%)
CMYK	cmyk(78.2%, 54%, 0%, 51.4%)
CIE-LAB	lab(25.61, 14.67, -41.31)
CIE-LCH	lch(25.61, 43.84, 289.55°)
OKLab	oklab(36.38% -0.0136 -0.1189)
OKLCH	oklch(36.38% 0.12 263.5)
XYZ	xyz(5.5519, 4.6139, 19.6628)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B397C #7C5E1B

analogous

#1B6A7C #1B397C #2D1B7C

triadic

#1B397C #7C1B39 #397C1B

tetradic

#1B397C #7C1B6A #7C5E1B #1B7C2D

square

#1B397C #7C1B6A #7C5E1B #1B7C2D

split-complementary

#1B397C #7C2D1B #6A7C1B

monochromatic

#050C19 #10224A #1B397C #2650AE #3D6CD5

Accessibility & contrast

On white

10.92

#1B397C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1B397C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B397C

10.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B397C	#FFFFFF	#000000	##FFFFFF
##1B397C	1.00	10.92	1.92	10.92
#FFFFFF	10.92	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B417E

Deuteranopia (green-blind)

#00387B

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b397c;
/* rgb */ color: rgb(27, 57, 124);
/* oklch */ color: oklch(36.4% 0.120 263.5);

Tailwind

colors: {
  custom: {
    50: '#676ea2',
    500: '#1b397c',
    950: '#000000',
  },
}

SCSS

$custom: #1b397c;
$custom-light: #676ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b397c",
  "rgb": {
    "r": 27,
    "g": 57,
    "b": 124
  },
  "hsl": {
    "h": 221.443,
    "s": 64.238,
    "l": 29.608
  },
  "oklch": {
    "l": 0.36379,
    "c": 0.1197,
    "h": 263.5
  },
  "luminance": 0.04615
}

Semantic roles & 50–950 ramp

primary

#1B397C

secondary

#B08E43

accent

#B441E7

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B397C

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

Preview Lab → · Contrast checker → · Palette generator →