#1F287F#1F287F

#1F287F is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.3% C 0.145 H 271.3°. Best body text is #FFFFFF at 12.59:1 contrast (WCAG AA passes).

Color values

HEX	#1F287F
RGB	rgb(31, 40, 127)
HSL	hsl(234, 61%, 31%)
HSV	hsv(234, 76%, 50%)
CMYK	cmyk(75.6%, 68.5%, 0%, 50.2%)
CIE-LAB	lab(21.36, 28.21, -50.12)
CIE-LCH	lch(21.36, 57.51, 299.37°)
OKLab	oklab(33.35% 0.0032 -0.1449)
OKLCH	oklch(33.35% 0.145 271.3)
XYZ	xyz(5.1533, 3.3407, 20.4478)
Luminance	0.0334 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F287F #7F761F

analogous

#1F587F #1F287F #461F7F

triadic

#1F287F #7F1F28 #287F1F

tetradic

#1F287F #7F1F58 #7F761F #1F7F46

square

#1F287F #7F1F58 #7F761F #1F7F46

split-complementary

#1F287F #7F461F #587F1F

monochromatic

#07091D #13194E #1F287F #2B37B0 #4654D2

Accessibility & contrast

On white

12.59

#1F287F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1F287F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F287F

12.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F287F	#FFFFFF	#000000	##FFFFFF
##1F287F	1.00	12.59	1.67	12.59
#FFFFFF	12.59	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003882

Deuteranopia (green-blind)

#002F7D

Tritanopia (blue-blind)

#003F50

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f287f;
/* rgb */ color: rgb(31, 40, 127);
/* oklch */ color: oklch(33.3% 0.145 271.3);

Tailwind

colors: {
  custom: {
    50: '#6a62a5',
    500: '#1f287f',
    950: '#000000',
  },
}

SCSS

$custom: #1f287f;
$custom-light: #6a62a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f287f",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 127
  },
  "hsl": {
    "h": 234.375,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.33348,
    "c": 0.14495,
    "h": 271.3
  },
  "luminance": 0.03341
}

Semantic roles & 50–950 ramp

primary

#1F287F

secondary

#B2A848

accent

#D544E4

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#08050F

muted

#7A797F

Preview Lab

Preview with #1F287F

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

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