#1F277E#1F277E

#1F277E is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.1% C 0.145 H 271.6°. Best body text is #FFFFFF at 12.73:1 contrast (WCAG AA passes).

Color values

HEX	#1F277E
RGB	rgb(31, 39, 126)
HSL	hsl(235, 61%, 31%)
HSV	hsv(235, 75%, 49%)
CMYK	cmyk(75.4%, 69%, 0%, 50.6%)
CIE-LAB	lab(21.01, 28.50, -50.06)
CIE-LCH	lch(21.01, 57.60, 299.66°)
OKLab	oklab(33.07% 0.0039 -0.1447)
OKLCH	oklch(33.07% 0.145 271.6)
XYZ	xyz(5.0552, 3.2482, 20.0952)
Luminance	0.0325 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F277E #7E761F

analogous

#1F567E #1F277E #461F7E

triadic

#1F277E #7E1F27 #277E1F

tetradic

#1F277E #7E1F56 #7E761F #1F7E46

square

#1F277E #7E1F56 #7E761F #1F7E46

split-complementary

#1F277E #7E461F #567E1F

monochromatic

#07091C #13184D #1F277E #2B36AF #4652D1

Accessibility & contrast

On white

12.73

#1F277E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1F277E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F277E

12.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F277E	#FFFFFF	#000000	##FFFFFF
##1F277E	1.00	12.73	1.65	12.73
#FFFFFF	12.73	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003781

Deuteranopia (green-blind)

#002E7C

Tritanopia (blue-blind)

#003E4F

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f277e;
/* rgb */ color: rgb(31, 39, 126);
/* oklch */ color: oklch(33.1% 0.145 271.6);

Tailwind

colors: {
  custom: {
    50: '#6a61a4',
    500: '#1f277e',
    950: '#000000',
  },
}

SCSS

$custom: #1f277e;
$custom-light: #6a61a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f277e",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 126
  },
  "hsl": {
    "h": 234.947,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.33065,
    "c": 0.14479,
    "h": 271.6
  },
  "luminance": 0.03249
}

Semantic roles & 50–950 ramp

primary

#1F277E

secondary

#B1A848

accent

#D644E4

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F277E

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

Preview Lab → · Contrast checker → · Palette generator →