#1B247B#1B247B

#1B247B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.0% C 0.145 H 270.6°. Best body text is #FFFFFF at 13.25:1 contrast (WCAG AA passes).

Color values

HEX	#1B247B
RGB	rgb(27, 36, 123)
HSL	hsl(234, 64%, 29%)
HSV	hsv(234, 78%, 48%)
CMYK	cmyk(78%, 70.7%, 0%, 51.8%)
CIE-LAB	lab(19.74, 28.91, -50.25)
CIE-LCH	lch(19.74, 57.98, 299.92°)
OKLab	oklab(31.99% 0.0016 -0.1454)
OKLCH	oklch(31.99% 0.145 270.6)
XYZ	xyz(4.6568, 2.9243, 19.0541)
Luminance	0.0293 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B247B #7B721B

analogous

#1B547B #1B247B #421B7B

triadic

#1B247B #7B1B24 #247B1B

tetradic

#1B247B #7B1B54 #7B721B #1B7B42

square

#1B247B #7B1B54 #7B721B #1B7B42

split-complementary

#1B247B #7B421B #547B1B

monochromatic

#060719 #101549 #1B247B #2633AD #3C4AD4

Accessibility & contrast

On white

13.25

#1B247B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1B247B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B247B

13.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B247B	#FFFFFF	#000000	##FFFFFF
##1B247B	1.00	13.25	1.59	13.25
#FFFFFF	13.25	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347E

Deuteranopia (green-blind)

#002B79

Tritanopia (blue-blind)

#003C4C

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b247b;
/* rgb */ color: rgb(27, 36, 123);
/* oklch */ color: oklch(32.0% 0.145 270.6);

Tailwind

colors: {
  custom: {
    50: '#685fa2',
    500: '#1b247b',
    950: '#000000',
  },
}

SCSS

$custom: #1b247b;
$custom-light: #685fa2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b247b",
  "rgb": {
    "r": 27,
    "g": 36,
    "b": 123
  },
  "hsl": {
    "h": 234.375,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.31986,
    "c": 0.14542,
    "h": 270.6
  },
  "luminance": 0.02925
}

Semantic roles & 50–950 ramp

primary

#1B247B

secondary

#AFA543

accent

#D741E7

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B247B

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

Preview Lab → · Contrast checker → · Palette generator →