#1B277E#1B277E

#1B277E is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.8% C 0.146 H 269.8°. Best body text is #FFFFFF at 12.82:1 contrast (WCAG AA passes).

Color values

HEX	#1B277E
RGB	rgb(27, 39, 126)
HSL	hsl(233, 65%, 30%)
HSV	hsv(233, 79%, 49%)
CMYK	cmyk(78.6%, 69%, 0%, 50.6%)
CIE-LAB	lab(20.79, 28.05, -50.43)
CIE-LCH	lch(20.79, 57.71, 299.08°)
OKLab	oklab(32.84% -0.0004 -0.1459)
OKLCH	oklch(32.84% 0.146 269.8)
XYZ	xyz(4.9421, 3.1899, 20.0899)
Luminance	0.0319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B277E #7E721B

analogous

#1B597E #1B277E #401B7E

triadic

#1B277E #7E1B27 #277E1B

tetradic

#1B277E #7E1B59 #7E721B #1B7E40

square

#1B277E #7E1B59 #7E721B #1B7E40

split-complementary

#1B277E #7E401B #597E1B

monochromatic

#050819 #10174C #1B277E #2637B0 #3E50D6

Accessibility & contrast

On white

12.82

#1B277E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1B277E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B277E

12.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B277E	#FFFFFF	#000000	##FFFFFF
##1B277E	1.00	12.82	1.64	12.82
#FFFFFF	12.82	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003781

Deuteranopia (green-blind)

#002D7C

Tritanopia (blue-blind)

#003E4F

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b277e;
/* rgb */ color: rgb(27, 39, 126);
/* oklch */ color: oklch(32.8% 0.146 269.8);

Tailwind

colors: {
  custom: {
    50: '#6961a4',
    500: '#1b277e',
    950: '#000000',
  },
}

SCSS

$custom: #1b277e;
$custom-light: #6961a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b277e",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 126
  },
  "hsl": {
    "h": 232.727,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.32842,
    "c": 0.14592,
    "h": 269.8
  },
  "luminance": 0.0319
}

Semantic roles & 50–950 ramp

primary

#1B277E

secondary

#B2A443

accent

#D340E8

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B277E

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

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