#1F369B#1F369B

#1F369B is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.7% C 0.166 H 267.6°. Best body text is #FFFFFF at 10.20:1 contrast (WCAG AA passes).

Color values

HEX	#1F369B
RGB	rgb(31, 54, 155)
HSL	hsl(229, 67%, 36%)
HSV	hsv(229, 80%, 61%)
CMYK	cmyk(80%, 65.2%, 0%, 39.2%)
CIE-LAB	lab(27.56, 29.51, -57.33)
CIE-LCH	lch(27.56, 64.48, 297.23°)
OKLab	oklab(38.7% -0.0071 -0.1659)
OKLCH	oklch(38.7% 0.166 267.6)
XYZ	xyz(7.7986, 5.2953, 31.6151)
Luminance	0.0530 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F369B #9B841F

analogous

#1F749B #1F369B #461F9B

triadic

#1F369B #9B1F36 #369B1F

tetradic

#1F369B #9B1F74 #9B841F #1F9B46

square

#1F369B #9B1F74 #9B841F #1F9B46

split-complementary

#1F369B #9B461F #749B1F

monochromatic

#0B1235 #152468 #1F369B #2948CE #5770DD

Accessibility & contrast

On white

10.20

#1F369B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#1F369B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F369B

10.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F369B	#FFFFFF	#000000	##FFFFFF
##1F369B	1.00	10.20	2.06	10.20
#FFFFFF	10.20	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00479E

Deuteranopia (green-blind)

#003B99

Tritanopia (blue-blind)

#005163

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1f369b;
/* rgb */ color: rgb(31, 54, 155);
/* oklch */ color: oklch(38.7% 0.166 267.6);

Tailwind

colors: {
  custom: {
    50: '#706db9',
    500: '#1f369b',
    950: '#000000',
  },
}

SCSS

$custom: #1f369b;
$custom-light: #706db9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f369b",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 155
  },
  "hsl": {
    "h": 228.871,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.38702,
    "c": 0.16607,
    "h": 267.6
  },
  "luminance": 0.05296
}

Semantic roles & 50–950 ramp

primary

#1F369B

secondary

#C1AD55

accent

#CA3EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F369B

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

Preview Lab → · Contrast checker → · Palette generator →