#1B297F#1B297F

#1B297F is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.3% C 0.145 H 269.3°. Best body text is #FFFFFF at 12.57:1 contrast (WCAG AA passes).

Color values

HEX	#1B297F
RGB	rgb(27, 41, 127)
HSL	hsl(232, 65%, 30%)
HSV	hsv(232, 79%, 50%)
CMYK	cmyk(78.7%, 67.7%, 0%, 50.2%)
CIE-LAB	lab(21.40, 27.08, -50.07)
CIE-LCH	lch(21.40, 56.92, 298.41°)
OKLab	oklab(33.32% -0.0017 -0.1448)
OKLCH	oklch(33.32% 0.145 269.3)
XYZ	xyz(5.0744, 3.3506, 20.4539)
Luminance	0.0335 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B297F #7F711B

analogous

#1B5B7F #1B297F #3F1B7F

triadic

#1B297F #7F1B29 #297F1B

tetradic

#1B297F #7F1B5B #7F711B #1B7F3F

square

#1B297F #7F1B5B #7F711B #1B7F3F

split-complementary

#1B297F #7F3F1B #5B7F1B

monochromatic

#06081A #10194D #1B297F #2639B1 #3E54D6

Accessibility & contrast

On white

12.57

#1B297F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1B297F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B297F

12.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B297F	#FFFFFF	#000000	##FFFFFF
##1B297F	1.00	12.57	1.67	12.57
#FFFFFF	12.57	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003882

Deuteranopia (green-blind)

#002F7D

Tritanopia (blue-blind)

#004050

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b297f;
/* rgb */ color: rgb(27, 41, 127);
/* oklch */ color: oklch(33.3% 0.145 269.3);

Tailwind

colors: {
  custom: {
    50: '#6962a5',
    500: '#1b297f',
    950: '#000000',
  },
}

SCSS

$custom: #1b297f;
$custom-light: #6962a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b297f",
  "rgb": {
    "r": 27,
    "g": 41,
    "b": 127
  },
  "hsl": {
    "h": 231.6,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.33316,
    "c": 0.14486,
    "h": 269.3
  },
  "luminance": 0.03351
}

Semantic roles & 50–950 ramp

primary

#1B297F

secondary

#B3A343

accent

#D040E8

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B297F

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

Preview Lab → · Contrast checker → · Palette generator →