#1F137F#1F137F

#1F137F is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.2% C 0.167 H 274.8°. Best body text is #FFFFFF at 14.41:1 contrast (WCAG AA passes).

Color values

HEX	#1F137F
RGB	rgb(31, 19, 127)
HSL	hsl(247, 74%, 29%)
HSV	hsv(247, 85%, 50%)
CMYK	cmyk(75.6%, 85%, 0%, 50.2%)
CIE-LAB	lab(16.94, 40.61, -57.42)
CIE-LCH	lch(16.94, 70.33, 305.27°)
OKLab	oklab(30.2% 0.0139 -0.166)
OKLCH	oklch(30.2% 0.167 274.8)
XYZ	xyz(4.6274, 2.2889, 20.2725)
Luminance	0.0229 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F137F #737F13

analogous

#133D7F #1F137F #55137F

triadic

#1F137F #7F1F13 #137F1F

tetradic

#1F137F #7F133D #737F13 #137F55

square

#1F137F #7F133D #737F13 #137F55

split-complementary

#1F137F #7F5513 #3D7F13

monochromatic

#06041B #120B4A #1F137F #2C1BB4 #412DE0

Accessibility & contrast

On white

14.41

#1F137F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#1F137F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F137F

14.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F137F	#FFFFFF	#000000	##FFFFFF
##1F137F	1.00	14.41	1.46	14.41
#FFFFFF	14.41	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E82

Deuteranopia (green-blind)

#00257D

Tritanopia (blue-blind)

#00364A

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1f137f;
/* rgb */ color: rgb(31, 19, 127);
/* oklch */ color: oklch(30.2% 0.167 274.8);

Tailwind

colors: {
  custom: {
    50: '#6d55a5',
    500: '#1f137f',
    950: '#000000',
  },
}

SCSS

$custom: #1f137f;
$custom-light: #6d55a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f137f",
  "rgb": {
    "r": 31,
    "g": 19,
    "b": 127
  },
  "hsl": {
    "h": 246.667,
    "s": 73.973,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30203,
    "c": 0.16659,
    "h": 274.8
  },
  "luminance": 0.02289
}

Semantic roles & 50–950 ramp

primary

#1F137F

secondary

#A7B439

accent

#F137DC

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1F137F

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

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