#1F338F#1F338F

#1F338F is a dark, vivid blue. Relative luminance 0.046; OKLCH L 37.0% C 0.153 H 268.2°. Best body text is #FFFFFF at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F338F
RGB	rgb(31, 51, 143)
HSL	hsl(229, 64%, 34%)
HSV	hsv(229, 78%, 56%)
CMYK	cmyk(78.3%, 64.3%, 0%, 43.9%)
CIE-LAB	lab(25.69, 26.91, -53.03)
CIE-LCH	lch(25.69, 59.47, 296.90°)
OKLab	oklab(36.98% -0.0049 -0.1534)
OKLCH	oklch(36.98% 0.153 268.2)
XYZ	xyz(6.7051, 4.6414, 26.5238)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F338F #8F7B1F

analogous

#1F6B8F #1F338F #431F8F

triadic

#1F338F #8F1F33 #338F1F

tetradic

#1F338F #8F1F6B #8F7B1F #1F8F43

square

#1F338F #8F1F6B #8F7B1F #1F8F43

split-complementary

#1F338F #8F431F #6B8F1F

monochromatic

#090F2A #14215D #1F338F #2A45C1 #4F68D9

Accessibility & contrast

On white

10.89

#1F338F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F338F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F338F

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F338F	#FFFFFF	#000000	##FFFFFF
##1F338F	1.00	10.89	1.93	10.89
#FFFFFF	10.89	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004292

Deuteranopia (green-blind)

#00388D

Tritanopia (blue-blind)

#004B5C

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f338f;
/* rgb */ color: rgb(31, 51, 143);
/* oklch */ color: oklch(37.0% 0.153 268.2);

Tailwind

colors: {
  custom: {
    50: '#6e6ab1',
    500: '#1f338f',
    950: '#000000',
  },
}

SCSS

$custom: #1f338f;
$custom-light: #6e6ab1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f338f",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 143
  },
  "hsl": {
    "h": 229.286,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.36984,
    "c": 0.15344,
    "h": 268.2
  },
  "luminance": 0.04642
}

Semantic roles & 50–950 ramp

primary

#1F338F

secondary

#BCA84E

accent

#CA40E7

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1F338F

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

Preview Lab → · Contrast checker → · Palette generator →