#1F278F#1F278F

#1F278F is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.8% C 0.168 H 270.7°. Best body text is #FFFFFF at 12.03:1 contrast (WCAG AA passes).

Color values

HEX	#1F278F
RGB	rgb(31, 39, 143)
HSL	hsl(236, 64%, 34%)
HSV	hsv(236, 78%, 56%)
CMYK	cmyk(78.3%, 72.7%, 0%, 43.9%)
CIE-LAB	lab(22.74, 34.80, -57.87)
CIE-LCH	lch(22.74, 67.53, 301.02°)
OKLab	oklab(34.84% 0.002 -0.1676)
OKLCH	oklch(34.84% 0.168 270.7)
XYZ	xyz(6.2468, 3.7248, 26.3710)
Luminance	0.0373 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F278F #8F871F

analogous

#1F5F8F #1F278F #4F1F8F

triadic

#1F278F #8F1F27 #278F1F

tetradic

#1F278F #8F1F5F #8F871F #1F8F4F

square

#1F278F #8F1F5F #8F871F #1F8F4F

split-complementary

#1F278F #8F4F1F #5F8F1F

monochromatic

#090C2A #14195D #1F278F #2A35C1 #4F59D9

Accessibility & contrast

On white

12.03

#1F278F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1F278F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F278F

12.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F278F	#FFFFFF	#000000	##FFFFFF
##1F278F	1.00	12.03	1.75	12.03
#FFFFFF	12.03	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C92

Deuteranopia (green-blind)

#00318D

Tritanopia (blue-blind)

#004458

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1f278f;
/* rgb */ color: rgb(31, 39, 143);
/* oklch */ color: oklch(34.8% 0.168 270.7);

Tailwind

colors: {
  custom: {
    50: '#6f62b1',
    500: '#1f278f',
    950: '#000000',
  },
}

SCSS

$custom: #1f278f;
$custom-light: #6f62b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f278f",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 143
  },
  "hsl": {
    "h": 235.714,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.34837,
    "c": 0.16757,
    "h": 270.7
  },
  "luminance": 0.03726
}

Semantic roles & 50–950 ramp

primary

#1F278F

secondary

#BCB44E

accent

#DB40E7

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#090511

muted

#7B7980

Preview Lab

Preview with #1F278F

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

Preview Lab → · Contrast checker → · Palette generator →