#1F338A#1F338A

#1F338A is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.5% C 0.146 H 268.1°. Best body text is #FFFFFF at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#1F338A
RGB	rgb(31, 51, 138)
HSL	hsl(229, 63%, 33%)
HSV	hsv(229, 78%, 54%)
CMYK	cmyk(77.5%, 63%, 0%, 45.9%)
CIE-LAB	lab(25.24, 24.97, -50.67)
CIE-LCH	lch(25.24, 56.48, 296.23°)
OKLab	oklab(36.51% -0.0048 -0.1464)
OKLCH	oklch(36.51% 0.147 268.1)
XYZ	xyz(6.3348, 4.4932, 24.5733)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F338A #8A761F

analogous

#1F688A #1F338A #401F8A

triadic

#1F338A #8A1F33 #338A1F

tetradic

#1F338A #8A1F68 #8A761F #1F8A40

square

#1F338A #8A1F68 #8A761F #1F8A40

split-complementary

#1F338A #8A401F #688A1F

monochromatic

#090E26 #142158 #1F338A #2A45BC #4C66D7

Accessibility & contrast

On white

11.06

#1F338A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1F338A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F338A

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F338A	#FFFFFF	#000000	##FFFFFF
##1F338A	1.00	11.06	1.90	11.06
#FFFFFF	11.06	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418D

Deuteranopia (green-blind)

#003788

Tritanopia (blue-blind)

#004959

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f338a;
/* rgb */ color: rgb(31, 51, 138);
/* oklch */ color: oklch(36.5% 0.146 268.1);

Tailwind

colors: {
  custom: {
    50: '#6c6aad',
    500: '#1f338a',
    950: '#000000',
  },
}

SCSS

$custom: #1f338a;
$custom-light: #6c6aad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f338a",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 138
  },
  "hsl": {
    "h": 228.785,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.36514,
    "c": 0.1465,
    "h": 268.1
  },
  "luminance": 0.04494
}

Semantic roles & 50–950 ramp

primary

#1F338A

secondary

#BAA54B

accent

#C841E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F338A

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

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