#1F359C#1F359C

#1F359C is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.6% C 0.169 H 267.8°. Best body text is #FFFFFF at 10.26:1 contrast (WCAG AA passes).

Color values

HEX	#1F359C
RGB	rgb(31, 53, 156)
HSL	hsl(229, 67%, 37%)
HSV	hsv(229, 80%, 61%)
CMYK	cmyk(80.1%, 66%, 0%, 38.8%)
CIE-LAB	lab(27.40, 30.56, -58.21)
CIE-LCH	lch(27.40, 65.74, 297.70°)
OKLab	oklab(38.61% -0.0065 -0.1685)
OKLCH	oklch(38.61% 0.169 267.8)
XYZ	xyz(7.8368, 5.2369, 32.0438)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F359C #9C861F

analogous

#1F749C #1F359C #481F9C

triadic

#1F359C #9C1F35 #359C1F

tetradic

#1F359C #9C1F74 #9C861F #1F9C48

square

#1F359C #9C1F74 #9C861F #1F9C48

split-complementary

#1F359C #9C481F #749C1F

monochromatic

#0B1236 #152469 #1F359C #2946CF #586FDE

Accessibility & contrast

On white

10.26

#1F359C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#1F359C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F359C

10.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F359C	#FFFFFF	#000000	##FFFFFF
##1F359C	1.00	10.26	2.05	10.26
#FFFFFF	10.26	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00479F

Deuteranopia (green-blind)

#003B9A

Tritanopia (blue-blind)

#005063

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1f359c;
/* rgb */ color: rgb(31, 53, 156);
/* oklch */ color: oklch(38.6% 0.169 267.8);

Tailwind

colors: {
  custom: {
    50: '#716cba',
    500: '#1f359c',
    950: '#000000',
  },
}

SCSS

$custom: #1f359c;
$custom-light: #716cba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f359c",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 156
  },
  "hsl": {
    "h": 229.44,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.38612,
    "c": 0.16861,
    "h": 267.8
  },
  "luminance": 0.05238
}

Semantic roles & 50–950 ramp

primary

#1F359C

secondary

#C1AE55

accent

#CC3EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F359C

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

Preview Lab → · Contrast checker → · Palette generator →