#1F277D#1F277D

#1F277D is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.0% C 0.143 H 271.6°. Best body text is #FFFFFF at 12.77:1 contrast (WCAG AA passes).

Color values

HEX	#1F277D
RGB	rgb(31, 39, 125)
HSL	hsl(235, 60%, 31%)
HSV	hsv(235, 75%, 49%)
CMYK	cmyk(75.2%, 68.8%, 0%, 51%)
CIE-LAB	lab(20.91, 28.12, -49.58)
CIE-LCH	lch(20.91, 57.00, 299.56°)
OKLab	oklab(32.96% 0.004 -0.1433)
OKLCH	oklch(32.96% 0.143 271.6)
XYZ	xyz(4.9910, 3.2225, 19.7570)
Luminance	0.0322 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F277D #7D751F

analogous

#1F567D #1F277D #461F7D

triadic

#1F277D #7D1F27 #277D1F

tetradic

#1F277D #7D1F56 #7D751F #1F7D46

square

#1F277D #7D1F56 #7D751F #1F7D46

split-complementary

#1F277D #7D461F #567D1F

monochromatic

#07081B #13184C #1F277D #2B36AE #4551D1

Accessibility & contrast

On white

12.77

#1F277D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1F277D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F277D

12.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F277D	#FFFFFF	#000000	##FFFFFF
##1F277D	1.00	12.77	1.64	12.77
#FFFFFF	12.77	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003780

Deuteranopia (green-blind)

#002E7B

Tritanopia (blue-blind)

#003E4E

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f277d;
/* rgb */ color: rgb(31, 39, 125);
/* oklch */ color: oklch(33.0% 0.143 271.6);

Tailwind

colors: {
  custom: {
    50: '#6a61a4',
    500: '#1f277d',
    950: '#000000',
  },
}

SCSS

$custom: #1f277d;
$custom-light: #6a61a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f277d",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 125
  },
  "hsl": {
    "h": 234.894,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.32963,
    "c": 0.14341,
    "h": 271.6
  },
  "luminance": 0.03223
}

Semantic roles & 50–950 ramp

primary

#1F277D

secondary

#B0A748

accent

#D644E3

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F277D

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

Preview Lab → · Contrast checker → · Palette generator →