#1F339B#1F339B

#1F339B is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.1% C 0.170 H 268.2°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#1F339B
RGB	rgb(31, 51, 155)
HSL	hsl(230, 67%, 36%)
HSV	hsv(230, 80%, 61%)
CMYK	cmyk(80%, 67.1%, 0%, 39.2%)
CIE-LAB	lab(26.80, 31.50, -58.57)
CIE-LCH	lch(26.80, 66.51, 298.27°)
OKLab	oklab(38.15% -0.0054 -0.1696)
OKLCH	oklch(38.15% 0.17 268.2)
XYZ	xyz(7.6632, 5.0246, 31.5700)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F339B #9B871F

analogous

#1F719B #1F339B #491F9B

triadic

#1F339B #9B1F33 #339B1F

tetradic

#1F339B #9B1F71 #9B871F #1F9B49

square

#1F339B #9B1F71 #9B871F #1F9B49

split-complementary

#1F339B #9B491F #719B1F

monochromatic

#0B1135 #152268 #1F339B #2944CE #576DDD

Accessibility & contrast

On white

10.47

#1F339B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1F339B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F339B

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F339B	#FFFFFF	#000000	##FFFFFF
##1F339B	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00459E

Deuteranopia (green-blind)

#003A99

Tritanopia (blue-blind)

#004F62

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f339b;
/* rgb */ color: rgb(31, 51, 155);
/* oklch */ color: oklch(38.1% 0.170 268.2);

Tailwind

colors: {
  custom: {
    50: '#716ab9',
    500: '#1f339b',
    950: '#000000',
  },
}

SCSS

$custom: #1f339b;
$custom-light: #716ab9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f339b",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 155
  },
  "hsl": {
    "h": 230.323,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.38148,
    "c": 0.16966,
    "h": 268.2
  },
  "luminance": 0.05026
}

Semantic roles & 50–950 ramp

primary

#1F339B

secondary

#C1B055

accent

#CE3EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1F339B

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

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