#1F277A#1F277A

#1F277A is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.7% C 0.139 H 271.8°. Best body text is #FFFFFF at 12.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F277A
RGB	rgb(31, 39, 122)
HSL	hsl(235, 59%, 30%)
HSV	hsv(235, 75%, 48%)
CMYK	cmyk(74.6%, 68%, 0%, 52.2%)
CIE-LAB	lab(20.62, 26.99, -48.15)
CIE-LCH	lch(20.62, 55.20, 299.27°)
OKLab	oklab(32.66% 0.0043 -0.1392)
OKLCH	oklch(32.66% 0.139 271.8)
XYZ	xyz(4.8023, 3.1470, 18.7629)
Luminance	0.0315 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F277A #7A721F

analogous

#1F557A #1F277A #441F7A

triadic

#1F277A #7A1F27 #277A1F

tetradic

#1F277A #7A1F55 #7A721F #1F7A44

square

#1F277A #7A1F55 #7A721F #1F7A44

split-complementary

#1F277A #7A441F #557A1F

monochromatic

#060818 #131749 #1F277A #2B37AB #4450CF

Accessibility & contrast

On white

12.89

#1F277A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1F277A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F277A

12.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F277A	#FFFFFF	#000000	##FFFFFF
##1F277A	1.00	12.89	1.63	12.89
#FFFFFF	12.89	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367D

Deuteranopia (green-blind)

#002D78

Tritanopia (blue-blind)

#003D4C

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f277a;
/* rgb */ color: rgb(31, 39, 122);
/* oklch */ color: oklch(32.7% 0.139 271.8);

Tailwind

colors: {
  custom: {
    50: '#6961a1',
    500: '#1f277a',
    950: '#000000',
  },
}

SCSS

$custom: #1f277a;
$custom-light: #6961a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f277a",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 122
  },
  "hsl": {
    "h": 234.725,
    "s": 59.477,
    "l": 30
  },
  "oklch": {
    "l": 0.32663,
    "c": 0.13923,
    "h": 271.8
  },
  "luminance": 0.03147
}

Semantic roles & 50–950 ramp

primary

#1F277A

secondary

#ADA447

accent

#D545E3

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F277A

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

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