#1F339E#1F339E

#1F339E is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.4% C 0.174 H 268.2°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#1F339E
RGB	rgb(31, 51, 158)
HSL	hsl(231, 67%, 37%)
HSV	hsv(231, 80%, 62%)
CMYK	cmyk(80.4%, 67.7%, 0%, 38%)
CIE-LAB	lab(27.09, 32.63, -59.93)
CIE-LCH	lch(27.09, 68.23, 298.57°)
OKLab	oklab(38.45% -0.0056 -0.1735)
OKLCH	oklch(38.45% 0.174 268.2)
XYZ	xyz(7.9183, 5.1267, 32.9133)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F339E #9E8A1F

analogous

#1F739E #1F339E #4A1F9E

triadic

#1F339E #9E1F33 #339E1F

tetradic

#1F339E #9E1F73 #9E8A1F #1F9E4A

square

#1F339E #9E1F73 #9E8A1F #1F9E4A

split-complementary

#1F339E #9E4A1F #739E1F

monochromatic

#0B1238 #15226B #1F339E #2944D1 #596EDE

Accessibility & contrast

On white

10.37

#1F339E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1F339E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F339E

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F339E	#FFFFFF	#000000	##FFFFFF
##1F339E	1.00	10.37	2.03	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046A1

Deuteranopia (green-blind)

#003A9C

Tritanopia (blue-blind)

#005064

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f339e;
/* rgb */ color: rgb(31, 51, 158);
/* oklch */ color: oklch(38.4% 0.174 268.2);

Tailwind

colors: {
  custom: {
    50: '#726abc',
    500: '#1f339e',
    950: '#000000',
  },
}

SCSS

$custom: #1f339e;
$custom-light: #726abc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f339e",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 158
  },
  "hsl": {
    "h": 230.551,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.38446,
    "c": 0.17362,
    "h": 268.2
  },
  "luminance": 0.05128
}

Semantic roles & 50–950 ramp

primary

#1F339E

secondary

#C2B156

accent

#CF3EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1F339E

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

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