#1F278A#1F278A

#1F278A is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.3% C 0.161 H 270.9°. Best body text is #FFFFFF at 12.24:1 contrast (WCAG AA passes).

Color values

HEX	#1F278A
RGB	rgb(31, 39, 138)
HSL	hsl(236, 63%, 33%)
HSV	hsv(236, 78%, 54%)
CMYK	cmyk(77.5%, 71.7%, 0%, 45.9%)
CIE-LAB	lab(22.22, 32.97, -55.62)
CIE-LCH	lch(22.22, 64.66, 300.66°)
OKLab	oklab(34.31% 0.0026 -0.161)
OKLCH	oklch(34.31% 0.161 270.9)
XYZ	xyz(5.8765, 3.5767, 24.4205)
Luminance	0.0358 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F278A #8A821F

analogous

#1F5C8A #1F278A #4C1F8A

triadic

#1F278A #8A1F27 #278A1F

tetradic

#1F278A #8A1F5C #8A821F #1F8A4C

square

#1F278A #8A1F5C #8A821F #1F8A4C

split-complementary

#1F278A #8A4C1F #5C8A1F

monochromatic

#090B26 #141958 #1F278A #2A35BC #4C57D7

Accessibility & contrast

On white

12.24

#1F278A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1F278A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F278A

12.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F278A	#FFFFFF	#000000	##FFFFFF
##1F278A	1.00	12.24	1.72	12.24
#FFFFFF	12.24	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A8D

Deuteranopia (green-blind)

#003088

Tritanopia (blue-blind)

#004355

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f278a;
/* rgb */ color: rgb(31, 39, 138);
/* oklch */ color: oklch(34.3% 0.161 270.9);

Tailwind

colors: {
  custom: {
    50: '#6d61ad',
    500: '#1f278a',
    950: '#000000',
  },
}

SCSS

$custom: #1f278a;
$custom-light: #6d61ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f278a",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 138
  },
  "hsl": {
    "h": 235.514,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.34306,
    "c": 0.161,
    "h": 270.9
  },
  "luminance": 0.03577
}

Semantic roles & 50–950 ramp

primary

#1F278A

secondary

#BAB14B

accent

#DA41E6

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F278A

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

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