#1B137F#1B137F

#1B137F is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.9% C 0.168 H 272.9°. Best body text is #FFFFFF at 14.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B137F
RGB	rgb(27, 19, 127)
HSL	hsl(244, 74%, 29%)
HSV	hsv(244, 85%, 50%)
CMYK	cmyk(78.7%, 85%, 0%, 50.2%)
CIE-LAB	lab(16.65, 40.33, -57.89)
CIE-LCH	lch(16.65, 70.55, 304.86°)
OKLab	oklab(29.93% 0.0084 -0.1675)
OKLCH	oklch(29.93% 0.168 272.9)
XYZ	xyz(4.5144, 2.2306, 20.2672)
Luminance	0.0223 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B137F #777F13

analogous

#13417F #1B137F #51137F

triadic

#1B137F #7F1B13 #137F1B

tetradic

#1B137F #7F1341 #777F13 #137F51

square

#1B137F #7F1341 #777F13 #137F51

split-complementary

#1B137F #7F5113 #417F13

monochromatic

#06041B #100B4A #1B137F #261BB4 #3A2DE0

Accessibility & contrast

On white

14.52

#1B137F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#1B137F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B137F

14.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B137F	#FFFFFF	#000000	##FFFFFF
##1B137F	1.00	14.52	1.45	14.52
#FFFFFF	14.52	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E82

Deuteranopia (green-blind)

#00247D

Tritanopia (blue-blind)

#00364A

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #1b137f;
/* rgb */ color: rgb(27, 19, 127);
/* oklch */ color: oklch(29.9% 0.168 272.9);

Tailwind

colors: {
  custom: {
    50: '#6b54a5',
    500: '#1b137f',
    950: '#000000',
  },
}

SCSS

$custom: #1b137f;
$custom-light: #6b54a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b137f",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 127
  },
  "hsl": {
    "h": 244.444,
    "s": 73.973,
    "l": 28.627
  },
  "oklch": {
    "l": 0.29934,
    "c": 0.16769,
    "h": 272.9
  },
  "luminance": 0.02231
}

Semantic roles & 50–950 ramp

primary

#1B137F

secondary

#ABB439

accent

#F137E3

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1B137F

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

Preview Lab → · Contrast checker → · Palette generator →