#1F3E9B#1F3E9B

#1F3E9B is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.3% C 0.156 H 265.6°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#1F3E9B
RGB	rgb(31, 62, 155)
HSL	hsl(225, 67%, 36%)
HSV	hsv(225, 80%, 61%)
CMYK	cmyk(80%, 60%, 0%, 39.2%)
CIE-LAB	lab(29.67, 24.10, -53.88)
CIE-LCH	lch(29.67, 59.03, 294.10°)
OKLab	oklab(40.27% -0.012 -0.1557)
OKLCH	oklch(40.27% 0.156 265.6)
XYZ	xyz(8.2020, 6.1022, 31.7495)
Luminance	0.0610 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3E9B #9B7C1F

analogous

#1F7C9B #1F3E9B #3E1F9B

triadic

#1F3E9B #9B1F3E #3E9B1F

tetradic

#1F3E9B #9B1F7C #9B7C1F #1F9B3E

square

#1F3E9B #9B1F7C #9B7C1F #1F9B3E

split-complementary

#1F3E9B #9B3E1F #7C9B1F

monochromatic

#0B1535 #152A68 #1F3E9B #2952CE #5779DD

Accessibility & contrast

On white

9.46

#1F3E9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1F3E9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3E9B

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3E9B	#FFFFFF	#000000	##FFFFFF
##1F3E9B	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9E

Deuteranopia (green-blind)

#004099

Tritanopia (blue-blind)

#005666

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f3e9b;
/* rgb */ color: rgb(31, 62, 155);
/* oklch */ color: oklch(40.3% 0.156 265.6);

Tailwind

colors: {
  custom: {
    50: '#7072b9',
    500: '#1f3e9b',
    950: '#000000',
  },
}

SCSS

$custom: #1f3e9b;
$custom-light: #7072b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3e9b",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 155
  },
  "hsl": {
    "h": 225,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.40267,
    "c": 0.15617,
    "h": 265.6
  },
  "luminance": 0.06103
}

Semantic roles & 50–950 ramp

primary

#1F3E9B

secondary

#C1A655

accent

#BF3EEA

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F3E9B

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

Preview Lab → · Contrast checker → · Palette generator →