#1F377A#1F377A

#1F377A is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.9% C 0.118 H 265.8°. Best body text is #FFFFFF at 11.14:1 contrast (WCAG AA passes).

Color values

HEX	#1F377A
RGB	rgb(31, 55, 122)
HSL	hsl(224, 59%, 30%)
HSV	hsv(224, 75%, 48%)
CMYK	cmyk(74.6%, 54.9%, 0%, 52.2%)
CIE-LAB	lab(25.04, 15.83, -40.96)
CIE-LCH	lch(25.04, 43.91, 291.13°)
OKLab	oklab(35.95% -0.0086 -0.1178)
OKLCH	oklch(35.95% 0.118 265.8)
XYZ	xyz(5.4429, 4.4283, 18.9765)
Luminance	0.0443 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F377A #7A621F

analogous

#1F647A #1F377A #351F7A

triadic

#1F377A #7A1F37 #377A1F

tetradic

#1F377A #7A1F64 #7A621F #1F7A35

square

#1F377A #7A1F64 #7A621F #1F7A35

split-complementary

#1F377A #7A351F #647A1F

monochromatic

#060B18 #132149 #1F377A #2B4DAB #4469CF

Accessibility & contrast

On white

11.14

#1F377A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#1F377A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F377A

11.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F377A	#FFFFFF	#000000	##FFFFFF
##1F377A	1.00	11.14	1.89	11.14
#FFFFFF	11.14	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#08407C

Deuteranopia (green-blind)

#003779

Tritanopia (blue-blind)

#004753

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f377a;
/* rgb */ color: rgb(31, 55, 122);
/* oklch */ color: oklch(35.9% 0.118 265.8);

Tailwind

colors: {
  custom: {
    50: '#686da1',
    500: '#1f377a',
    950: '#000000',
  },
}

SCSS

$custom: #1f377a;
$custom-light: #686da1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f377a",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 122
  },
  "hsl": {
    "h": 224.176,
    "s": 59.477,
    "l": 30
  },
  "oklch": {
    "l": 0.3595,
    "c": 0.11816,
    "h": 265.8
  },
  "luminance": 0.04429
}

Semantic roles & 50–950 ramp

primary

#1F377A

secondary

#AD9247

accent

#B945E3

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F377A

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

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