#1F277F#1F277F

#1F277F is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.2% C 0.146 H 271.5°. Best body text is #FFFFFF at 12.69:1 contrast (WCAG AA passes).

Color values

HEX	#1F277F
RGB	rgb(31, 39, 127)
HSL	hsl(235, 61%, 31%)
HSV	hsv(235, 76%, 50%)
CMYK	cmyk(75.6%, 69.3%, 0%, 50.2%)
CIE-LAB	lab(21.11, 28.88, -50.53)
CIE-LCH	lch(21.11, 58.20, 299.75°)
OKLab	oklab(33.17% 0.0038 -0.1461)
OKLCH	oklch(33.17% 0.146 271.5)
XYZ	xyz(5.1201, 3.2741, 20.4367)
Luminance	0.0328 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F277F #7F771F

analogous

#1F577F #1F277F #471F7F

triadic

#1F277F #7F1F27 #277F1F

tetradic

#1F277F #7F1F57 #7F771F #1F7F47

square

#1F277F #7F1F57 #7F771F #1F7F47

split-complementary

#1F277F #7F471F #577F1F

monochromatic

#07091D #13184E #1F277F #2B36B0 #4652D2

Accessibility & contrast

On white

12.69

#1F277F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#1F277F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F277F

12.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F277F	#FFFFFF	#000000	##FFFFFF
##1F277F	1.00	12.69	1.66	12.69
#FFFFFF	12.69	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003782

Deuteranopia (green-blind)

#002E7D

Tritanopia (blue-blind)

#003F4F

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f277f;
/* rgb */ color: rgb(31, 39, 127);
/* oklch */ color: oklch(33.2% 0.146 271.5);

Tailwind

colors: {
  custom: {
    50: '#6b61a5',
    500: '#1f277f',
    950: '#000000',
  },
}

SCSS

$custom: #1f277f;
$custom-light: #6b61a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f277f",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 127
  },
  "hsl": {
    "h": 235,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.33166,
    "c": 0.14617,
    "h": 271.5
  },
  "luminance": 0.03275
}

Semantic roles & 50–950 ramp

primary

#1F277F

secondary

#B2A948

accent

#D744E4

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#08050F

muted

#7A797F

Preview Lab

Preview with #1F277F

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

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