#1B2278#1B2278

#1B2278 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.3% C 0.144 H 271.3°. Best body text is #FFFFFF at 13.58:1 contrast (WCAG AA passes).

Color values

HEX	#1B2278
RGB	rgb(27, 34, 120)
HSL	hsl(235, 63%, 29%)
HSV	hsv(235, 78%, 47%)
CMYK	cmyk(77.5%, 71.7%, 0%, 52.9%)
CIE-LAB	lab(18.94, 29.11, -49.65)
CIE-LCH	lch(18.94, 57.55, 300.38°)
OKLab	oklab(31.32% 0.0032 -0.1436)
OKLCH	oklch(31.32% 0.144 271.3)
XYZ	xyz(4.4130, 2.7327, 18.0605)
Luminance	0.0273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2278 #78711B

analogous

#1B5178 #1B2278 #431B78

triadic

#1B2278 #781B22 #22781B

tetradic

#1B2278 #781B51 #78711B #1B7843

square

#1B2278 #781B51 #78711B #1B7843

split-complementary

#1B2278 #78431B #51781B

monochromatic

#060719 #101446 #1B2278 #2630AA #3B46D3

Accessibility & contrast

On white

13.58

#1B2278 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B2278 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2278

13.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2278	#FFFFFF	#000000	##FFFFFF
##1B2278	1.00	13.58	1.55	13.58
#FFFFFF	13.58	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327B

Deuteranopia (green-blind)

#002A76

Tritanopia (blue-blind)

#003A4A

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b2278;
/* rgb */ color: rgb(27, 34, 120);
/* oklch */ color: oklch(31.3% 0.144 271.3);

Tailwind

colors: {
  custom: {
    50: '#685da0',
    500: '#1b2278',
    950: '#000000',
  },
}

SCSS

$custom: #1b2278;
$custom-light: #685da0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2278",
  "rgb": {
    "r": 27,
    "g": 34,
    "b": 120
  },
  "hsl": {
    "h": 235.484,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.31315,
    "c": 0.14368,
    "h": 271.3
  },
  "luminance": 0.02733
}

Semantic roles & 50–950 ramp

primary

#1B2278

secondary

#ACA443

accent

#DA41E6

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07040F

muted

#7A797E

Preview Lab

Preview with #1B2278

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

Preview Lab → · Contrast checker → · Palette generator →