#1F3375#1F3375

#1F3375 is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.6% C 0.116 H 267.3°. Best body text is #FFFFFF at 11.74:1 contrast (WCAG AA passes).

Color values

HEX	#1F3375
RGB	rgb(31, 51, 117)
HSL	hsl(226, 58%, 29%)
HSV	hsv(226, 74%, 46%)
CMYK	cmyk(73.5%, 56.4%, 0%, 54.1%)
CIE-LAB	lab(23.48, 16.65, -40.31)
CIE-LCH	lch(23.48, 43.61, 292.45°)
OKLab	oklab(34.65% -0.0054 -0.116)
OKLCH	oklch(34.65% 0.116 267.3)
XYZ	xyz(4.9587, 3.9428, 17.3259)
Luminance	0.0394 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3375 #75611F

analogous

#1F5E75 #1F3375 #361F75

triadic

#1F3375 #751F33 #33751F

tetradic

#1F3375 #751F5E #75611F #1F7536

square

#1F3375 #751F5E #75611F #1F7536

split-complementary

#1F3375 #75361F #5E751F

monochromatic

#060B18 #121E45 #1F3375 #2C48A5 #4262CD

Accessibility & contrast

On white

11.74

#1F3375 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1F3375 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3375

11.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3375	#FFFFFF	#000000	##FFFFFF
##1F3375	1.00	11.74	1.79	11.74
#FFFFFF	11.74	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#023C77

Deuteranopia (green-blind)

#003474

Tritanopia (blue-blind)

#00434E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f3375;
/* rgb */ color: rgb(31, 51, 117);
/* oklch */ color: oklch(34.6% 0.116 267.3);

Tailwind

colors: {
  custom: {
    50: '#676a9d',
    500: '#1f3375',
    950: '#000000',
  },
}

SCSS

$custom: #1f3375;
$custom-light: #676a9d;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3375",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 117
  },
  "hsl": {
    "h": 226.047,
    "s": 58.108,
    "l": 29.02
  },
  "oklch": {
    "l": 0.3465,
    "c": 0.11612,
    "h": 267.3
  },
  "luminance": 0.03943
}

Semantic roles & 50–950 ramp

primary

#1F3375

secondary

#A99247

accent

#BD46E1

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060E

muted

#7A7A7E

Preview Lab

Preview with #1F3375

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

Preview Lab → · Contrast checker → · Palette generator →