#1F227B#1F227B

#1F227B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.9% C 0.147 H 272.9°. Best body text is #FFFFFF at 13.35:1 contrast (WCAG AA passes).

Color values

HEX	#1F227B
RGB	rgb(31, 34, 123)
HSL	hsl(238, 60%, 30%)
HSV	hsv(238, 75%, 48%)
CMYK	cmyk(74.8%, 72.4%, 0%, 51.8%)
CIE-LAB	lab(19.49, 30.67, -50.64)
CIE-LCH	lch(19.49, 59.21, 301.20°)
OKLab	oklab(31.87% 0.0075 -0.1465)
OKLCH	oklch(31.87% 0.147 272.9)
XYZ	xyz(4.7111, 2.8649, 19.0398)
Luminance	0.0286 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F227B #7B781F

analogous

#1F507B #1F227B #4A1F7B

triadic

#1F227B #7B1F22 #227B1F

tetradic

#1F227B #7B1F50 #7B781F #1F7B4A

square

#1F227B #7B1F50 #7B781F #1F7B4A

split-complementary

#1F227B #7B4A1F #507B1F

monochromatic

#060719 #13144A #1F227B #2B30AC #4449D0

Accessibility & contrast

On white

13.35

#1F227B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1F227B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F227B

13.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F227B	#FFFFFF	#000000	##FFFFFF
##1F227B	1.00	13.35	1.57	13.35
#FFFFFF	13.35	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347E

Deuteranopia (green-blind)

#002B79

Tritanopia (blue-blind)

#003B4C

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1f227b;
/* rgb */ color: rgb(31, 34, 123);
/* oklch */ color: oklch(31.9% 0.147 272.9);

Tailwind

colors: {
  custom: {
    50: '#6a5da2',
    500: '#1f227b',
    950: '#000000',
  },
}

SCSS

$custom: #1f227b;
$custom-light: #6a5da2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f227b",
  "rgb": {
    "r": 31,
    "g": 34,
    "b": 123
  },
  "hsl": {
    "h": 238.043,
    "s": 59.74,
    "l": 30.196
  },
  "oklch": {
    "l": 0.31875,
    "c": 0.14665,
    "h": 272.9
  },
  "luminance": 0.02865
}

Semantic roles & 50–950 ramp

primary

#1F227B

secondary

#AEAB48

accent

#DE45E3

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1F227B

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

Preview Lab → · Contrast checker → · Palette generator →