#1F277C#1F277C

#1F277C is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.9% C 0.142 H 271.7°. Best body text is #FFFFFF at 12.81:1 contrast (WCAG AA passes).

Color values

HEX	#1F277C
RGB	rgb(31, 39, 124)
HSL	hsl(235, 60%, 30%)
HSV	hsv(235, 75%, 49%)
CMYK	cmyk(75%, 68.5%, 0%, 51.4%)
CIE-LAB	lab(20.82, 27.75, -49.11)
CIE-LCH	lch(20.82, 56.40, 299.47°)
OKLab	oklab(32.86% 0.0041 -0.142)
OKLCH	oklch(32.86% 0.142 271.7)
XYZ	xyz(4.9275, 3.1971, 19.4223)
Luminance	0.0320 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F277C #7C741F

analogous

#1F557C #1F277C #461F7C

triadic

#1F277C #7C1F27 #277C1F

tetradic

#1F277C #7C1F55 #7C741F #1F7C46

square

#1F277C #7C1F55 #7C741F #1F7C46

split-complementary

#1F277C #7C461F #557C1F

monochromatic

#07081A #13184B #1F277C #2B36AD #4551D0

Accessibility & contrast

On white

12.81

#1F277C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1F277C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F277C

12.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F277C	#FFFFFF	#000000	##FFFFFF
##1F277C	1.00	12.81	1.64	12.81
#FFFFFF	12.81	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367F

Deuteranopia (green-blind)

#002E7A

Tritanopia (blue-blind)

#003E4E

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f277c;
/* rgb */ color: rgb(31, 39, 124);
/* oklch */ color: oklch(32.9% 0.142 271.7);

Tailwind

colors: {
  custom: {
    50: '#6a61a3',
    500: '#1f277c',
    950: '#000000',
  },
}

SCSS

$custom: #1f277c;
$custom-light: #6a61a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f277c",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 124
  },
  "hsl": {
    "h": 234.839,
    "s": 60,
    "l": 30.392
  },
  "oklch": {
    "l": 0.32863,
    "c": 0.14202,
    "h": 271.7
  },
  "luminance": 0.03198
}

Semantic roles & 50–950 ramp

primary

#1F277C

secondary

#AFA648

accent

#D645E3

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F277C

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

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