#1F439E#1F439E

#1F439E is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.6% C 0.154 H 264.3°. Best body text is #FFFFFF at 8.92:1 contrast (WCAG AA passes).

Color values

HEX	#1F439E
RGB	rgb(31, 67, 158)
HSL	hsl(223, 67%, 37%)
HSV	hsv(223, 80%, 62%)
CMYK	cmyk(80.4%, 57.6%, 0%, 38%)
CIE-LAB	lab(31.28, 21.88, -53.07)
CIE-LCH	lch(31.28, 57.40, 292.41°)
OKLab	oklab(41.56% -0.0153 -0.1532)
OKLCH	oklch(41.56% 0.154 264.3)
XYZ	xyz(8.7416, 6.7732, 33.1878)
Luminance	0.0677 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F439E #9E7A1F

analogous

#1F839E #1F439E #3A1F9E

triadic

#1F439E #9E1F43 #439E1F

tetradic

#1F439E #9E1F83 #9E7A1F #1F9E3A

square

#1F439E #9E1F83 #9E7A1F #1F9E3A

split-complementary

#1F439E #9E3A1F #839E1F

monochromatic

#0B1838 #152D6B #1F439E #2959D1 #597FDE

Accessibility & contrast

On white

8.92

#1F439E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#1F439E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F439E

8.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F439E	#FFFFFF	#000000	##FFFFFF
##1F439E	1.00	8.92	2.35	8.92
#FFFFFF	8.92	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A1

Deuteranopia (green-blind)

#00449C

Tritanopia (blue-blind)

#005A6A

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1f439e;
/* rgb */ color: rgb(31, 67, 158);
/* oklch */ color: oklch(41.6% 0.154 264.3);

Tailwind

colors: {
  custom: {
    50: '#7076bb',
    500: '#1f439e',
    950: '#000000',
  },
}

SCSS

$custom: #1f439e;
$custom-light: #7076bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f439e",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 158
  },
  "hsl": {
    "h": 222.992,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.41556,
    "c": 0.154,
    "h": 264.3
  },
  "luminance": 0.06774
}

Semantic roles & 50–950 ramp

primary

#1F439E

secondary

#C2A456

accent

#B93EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F439E

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

Preview Lab → · Contrast checker → · Palette generator →