#1F278B#1F278B

#1F278B is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.4% C 0.162 H 270.9°. Best body text is #FFFFFF at 12.20:1 contrast (WCAG AA passes).

Color values

HEX	#1F278B
RGB	rgb(31, 39, 139)
HSL	hsl(236, 64%, 33%)
HSV	hsv(236, 78%, 55%)
CMYK	cmyk(77.7%, 71.9%, 0%, 45.5%)
CIE-LAB	lab(22.32, 33.34, -56.07)
CIE-LCH	lch(22.32, 65.23, 300.73°)
OKLab	oklab(34.41% 0.0025 -0.1623)
OKLCH	oklch(34.41% 0.162 270.9)
XYZ	xyz(5.9492, 3.6058, 24.8035)
Luminance	0.0361 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F278B #8B831F

analogous

#1F5D8B #1F278B #4D1F8B

triadic

#1F278B #8B1F27 #278B1F

tetradic

#1F278B #8B1F5D #8B831F #1F8B4D

square

#1F278B #8B1F5D #8B831F #1F8B4D

split-complementary

#1F278B #8B4D1F #5D8B1F

monochromatic

#090B27 #141959 #1F278B #2A35BD #4D57D7

Accessibility & contrast

On white

12.20

#1F278B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1F278B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F278B

12.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F278B	#FFFFFF	#000000	##FFFFFF
##1F278B	1.00	12.20	1.72	12.20
#FFFFFF	12.20	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B8E

Deuteranopia (green-blind)

#003089

Tritanopia (blue-blind)

#004356

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f278b;
/* rgb */ color: rgb(31, 39, 139);
/* oklch */ color: oklch(34.4% 0.162 270.9);

Tailwind

colors: {
  custom: {
    50: '#6e62ae',
    500: '#1f278b',
    950: '#000000',
  },
}

SCSS

$custom: #1f278b;
$custom-light: #6e62ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f278b",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 139
  },
  "hsl": {
    "h": 235.556,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.34411,
    "c": 0.16233,
    "h": 270.9
  },
  "luminance": 0.03606
}

Semantic roles & 50–950 ramp

primary

#1F278B

secondary

#BAB24C

accent

#DA41E7

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F278B

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

Preview Lab → · Contrast checker → · Palette generator →