#1F377D#1F377D

#1F377D is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.123 H 266.1°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#1F377D
RGB	rgb(31, 55, 125)
HSL	hsl(225, 60%, 31%)
HSV	hsv(225, 75%, 49%)
CMYK	cmyk(75.2%, 56%, 0%, 51%)
CIE-LAB	lab(25.27, 17.03, -42.48)
CIE-LCH	lch(25.27, 45.76, 291.85°)
OKLab	oklab(36.2% -0.0084 -0.1223)
OKLCH	oklch(36.2% 0.123 266.1)
XYZ	xyz(5.6316, 4.5038, 19.9706)
Luminance	0.0450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F377D #7D651F

analogous

#1F667D #1F377D #361F7D

triadic

#1F377D #7D1F37 #377D1F

tetradic

#1F377D #7D1F66 #7D651F #1F7D36

square

#1F377D #7D1F66 #7D651F #1F7D36

split-complementary

#1F377D #7D361F #667D1F

monochromatic

#070C1B #13214C #1F377D #2B4DAE #4569D1

Accessibility & contrast

On white

11.05

#1F377D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1F377D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F377D

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F377D	#FFFFFF	#000000	##FFFFFF
##1F377D	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01407F

Deuteranopia (green-blind)

#00387C

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f377d;
/* rgb */ color: rgb(31, 55, 125);
/* oklch */ color: oklch(36.2% 0.123 266.1);

Tailwind

colors: {
  custom: {
    50: '#696da3',
    500: '#1f377d',
    950: '#000000',
  },
}

SCSS

$custom: #1f377d;
$custom-light: #696da3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f377d",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 125
  },
  "hsl": {
    "h": 224.681,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36199,
    "c": 0.12259,
    "h": 266.1
  },
  "luminance": 0.04504
}

Semantic roles & 50–950 ramp

primary

#1F377D

secondary

#B09548

accent

#BB44E3

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F377D

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

Preview Lab → · Contrast checker → · Palette generator →