#1F377E#1F377E

#1F377E is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.3% C 0.124 H 266.2°. Best body text is #FFFFFF at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#1F377E
RGB	rgb(31, 55, 126)
HSL	hsl(225, 61%, 31%)
HSV	hsv(225, 75%, 49%)
CMYK	cmyk(75.4%, 56.3%, 0%, 50.6%)
CIE-LAB	lab(25.35, 17.43, -42.98)
CIE-LCH	lch(25.35, 46.38, 292.08°)
OKLab	oklab(36.28% -0.0083 -0.1238)
OKLCH	oklch(36.28% 0.124 266.2)
XYZ	xyz(5.6958, 4.5294, 20.3087)
Luminance	0.0453 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F377E #7E661F

analogous

#1F667E #1F377E #361F7E

triadic

#1F377E #7E1F37 #377E1F

tetradic

#1F377E #7E1F66 #7E661F #1F7E36

square

#1F377E #7E1F66 #7E661F #1F7E36

split-complementary

#1F377E #7E361F #667E1F

monochromatic

#070C1C #13224D #1F377E #2B4CAF #4669D1

Accessibility & contrast

On white

11.02

#1F377E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1F377E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F377E

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F377E	#FFFFFF	#000000	##FFFFFF
##1F377E	1.00	11.02	1.91	11.02
#FFFFFF	11.02	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004180

Deuteranopia (green-blind)

#00387D

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f377e;
/* rgb */ color: rgb(31, 55, 126);
/* oklch */ color: oklch(36.3% 0.124 266.2);

Tailwind

colors: {
  custom: {
    50: '#696da4',
    500: '#1f377e',
    950: '#000000',
  },
}

SCSS

$custom: #1f377e;
$custom-light: #696da4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f377e",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 126
  },
  "hsl": {
    "h": 224.842,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.36283,
    "c": 0.12406,
    "h": 266.2
  },
  "luminance": 0.0453
}

Semantic roles & 50–950 ramp

primary

#1F377E

secondary

#B19648

accent

#BB44E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F377E

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

Preview Lab → · Contrast checker → · Palette generator →