#1F339C#1F339C

#1F339C is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.2% C 0.171 H 268.2°. Best body text is #FFFFFF at 10.44:1 contrast (WCAG AA passes).

Color values

HEX	#1F339C
RGB	rgb(31, 51, 156)
HSL	hsl(230, 67%, 37%)
HSV	hsv(230, 80%, 61%)
CMYK	cmyk(80.1%, 67.3%, 0%, 38.8%)
CIE-LAB	lab(26.90, 31.88, -59.03)
CIE-LCH	lch(26.90, 67.08, 298.37°)
OKLab	oklab(38.25% -0.0054 -0.1709)
OKLCH	oklch(38.25% 0.171 268.2)
XYZ	xyz(7.7476, 5.0584, 32.0141)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F339C #9C881F

analogous

#1F729C #1F339C #4A1F9C

triadic

#1F339C #9C1F33 #339C1F

tetradic

#1F339C #9C1F72 #9C881F #1F9C4A

square

#1F339C #9C1F72 #9C881F #1F9C4A

split-complementary

#1F339C #9C4A1F #729C1F

monochromatic

#0B1236 #152269 #1F339C #2944CF #586DDE

Accessibility & contrast

On white

10.44

#1F339C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1F339C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F339C

10.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F339C	#FFFFFF	#000000	##FFFFFF
##1F339C	1.00	10.44	2.01	10.44
#FFFFFF	10.44	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00469F

Deuteranopia (green-blind)

#003A9A

Tritanopia (blue-blind)

#004F63

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f339c;
/* rgb */ color: rgb(31, 51, 156);
/* oklch */ color: oklch(38.2% 0.171 268.2);

Tailwind

colors: {
  custom: {
    50: '#716aba',
    500: '#1f339c',
    950: '#000000',
  },
}

SCSS

$custom: #1f339c;
$custom-light: #716aba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f339c",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 156
  },
  "hsl": {
    "h": 230.4,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.38247,
    "c": 0.17098,
    "h": 268.2
  },
  "luminance": 0.05059
}

Semantic roles & 50–950 ramp

primary

#1F339C

secondary

#C1B055

accent

#CE3EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1F339C

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

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