#1B2F80#1B2F80

#1B2F80 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.6% C 0.139 H 267.6°. Best body text is #FFFFFF at 11.90:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F80
RGB	rgb(27, 47, 128)
HSL	hsl(228, 65%, 30%)
HSV	hsv(228, 79%, 50%)
CMYK	cmyk(78.9%, 63.3%, 0%, 49.8%)
CIE-LAB	lab(23.08, 23.33, -47.94)
CIE-LCH	lch(23.08, 53.31, 295.95°)
OKLab	oklab(34.59% -0.0057 -0.1386)
OKLCH	oklch(34.59% 0.139 267.6)
XYZ	xyz(5.3634, 3.8240, 20.8733)
Luminance	0.0382 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F80 #806C1B

analogous

#1B6180 #1B2F80 #3A1B80

triadic

#1B2F80 #801B2F #2F801B

tetradic

#1B2F80 #801B61 #806C1B #1B803A

square

#1B2F80 #801B61 #806C1B #1B803A

split-complementary

#1B2F80 #803A1B #61801B

monochromatic

#060A1B #101C4D #1B2F80 #2642B3 #3F5DD6

Accessibility & contrast

On white

11.90

#1B2F80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1B2F80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F80

11.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F80	#FFFFFF	#000000	##FFFFFF
##1B2F80	1.00	11.90	1.77	11.90
#FFFFFF	11.90	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C83

Deuteranopia (green-blind)

#00327E

Tritanopia (blue-blind)

#004452

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b2f80;
/* rgb */ color: rgb(27, 47, 128);
/* oklch */ color: oklch(34.6% 0.139 267.6);

Tailwind

colors: {
  custom: {
    50: '#6967a6',
    500: '#1b2f80',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f80;
$custom-light: #6967a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f80",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 128
  },
  "hsl": {
    "h": 228.119,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.34586,
    "c": 0.13868,
    "h": 267.6
  },
  "luminance": 0.03825
}

Semantic roles & 50–950 ramp

primary

#1B2F80

secondary

#B49D43

accent

#C740E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B2F80

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

Preview Lab → · Contrast checker → · Palette generator →