#1B276A#1B276A

#1B276A is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.9% C 0.117 H 270.2°. Best body text is #FFFFFF at 13.59:1 contrast (WCAG AA passes).

Color values

HEX	#1B276A
RGB	rgb(27, 39, 106)
HSL	hsl(231, 59%, 26%)
HSV	hsv(231, 75%, 42%)
CMYK	cmyk(74.5%, 63.2%, 0%, 58.4%)
CIE-LAB	lab(18.90, 20.19, -40.67)
CIE-LCH	lch(18.90, 45.41, 296.40°)
OKLab	oklab(30.88% 0.0005 -0.1173)
OKLCH	oklch(30.88% 0.117 270.2)
XYZ	xyz(3.7781, 2.7243, 13.9596)
Luminance	0.0272 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B276A #6A5E1B

analogous

#1B4E6A #1B276A #361B6A

triadic

#1B276A #6A1B27 #276A1B

tetradic

#1B276A #6A1B4E #6A5E1B #1B6A36

square

#1B276A #6A1B4E #6A5E1B #1B6A36

split-complementary

#1B276A #6A361B #4E6A1B

monochromatic

#060918 #0F1539 #1B276A #27399B #344BCB

Accessibility & contrast

On white

13.59

#1B276A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B276A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B276A

13.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B276A	#FFFFFF	#000000	##FFFFFF
##1B276A	1.00	13.59	1.55	13.59
#FFFFFF	13.59	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00326C

Deuteranopia (green-blind)

#002A69

Tritanopia (blue-blind)

#003844

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b276a;
/* rgb */ color: rgb(27, 39, 106);
/* oklch */ color: oklch(30.9% 0.117 270.2);

Tailwind

colors: {
  custom: {
    50: '#646095',
    500: '#1b276a',
    950: '#000000',
  },
}

SCSS

$custom: #1b276a;
$custom-light: #646095;
$custom-dark: #000000;

JSON

{
  "hex": "#1b276a",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 106
  },
  "hsl": {
    "h": 230.886,
    "s": 59.398,
    "l": 26.078
  },
  "oklch": {
    "l": 0.30875,
    "c": 0.11732,
    "h": 270.2
  },
  "luminance": 0.02725
}

Semantic roles & 50–950 ramp

primary

#1B276A

secondary

#9F9142

accent

#CB45E3

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06050D

muted

#7A797E

Preview Lab

Preview with #1B276A

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

Preview Lab → · Contrast checker → · Palette generator →