#1F278E#1F278E

#1F278E is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.7% C 0.166 H 270.7°. Best body text is #FFFFFF at 12.08:1 contrast (WCAG AA passes).

Color values

HEX	#1F278E
RGB	rgb(31, 39, 142)
HSL	hsl(236, 64%, 34%)
HSV	hsv(236, 78%, 56%)
CMYK	cmyk(78.2%, 72.5%, 0%, 44.3%)
CIE-LAB	lab(22.64, 34.43, -57.43)
CIE-LCH	lch(22.64, 66.96, 300.95°)
OKLab	oklab(34.73% 0.0021 -0.1662)
OKLCH	oklch(34.73% 0.166 270.7)
XYZ	xyz(6.1714, 3.6947, 25.9738)
Luminance	0.0369 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F278E #8E861F

analogous

#1F5F8E #1F278E #4F1F8E

triadic

#1F278E #8E1F27 #278E1F

tetradic

#1F278E #8E1F5F #8E861F #1F8E4F

square

#1F278E #8E1F5F #8E861F #1F8E4F

split-complementary

#1F278E #8E4F1F #5F8E1F

monochromatic

#090B2A #14195C #1F278E #2A35C0 #4F59D9

Accessibility & contrast

On white

12.08

#1F278E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1F278E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F278E

12.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F278E	#FFFFFF	#000000	##FFFFFF
##1F278E	1.00	12.08	1.74	12.08
#FFFFFF	12.08	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B91

Deuteranopia (green-blind)

#00318C

Tritanopia (blue-blind)

#004457

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1f278e;
/* rgb */ color: rgb(31, 39, 142);
/* oklch */ color: oklch(34.7% 0.166 270.7);

Tailwind

colors: {
  custom: {
    50: '#6e62b0',
    500: '#1f278e',
    950: '#000000',
  },
}

SCSS

$custom: #1f278e;
$custom-light: #6e62b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f278e",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 142
  },
  "hsl": {
    "h": 235.676,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.3473,
    "c": 0.16626,
    "h": 270.7
  },
  "luminance": 0.03695
}

Semantic roles & 50–950 ramp

primary

#1F278E

secondary

#BBB44D

accent

#DB41E7

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#090511

muted

#7B7980

Preview Lab

Preview with #1F278E

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

Preview Lab → · Contrast checker → · Palette generator →