#1F308E#1F308E

#1F308E is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.3% C 0.156 H 268.9°. Best body text is #FFFFFF at 11.22:1 contrast (WCAG AA passes).

Color values

HEX	#1F308E
RGB	rgb(31, 48, 142)
HSL	hsl(231, 64%, 34%)
HSV	hsv(231, 78%, 56%)
CMYK	cmyk(78.2%, 66.2%, 0%, 44.3%)
CIE-LAB	lab(24.82, 28.55, -53.83)
CIE-LCH	lch(24.82, 60.94, 297.94°)
OKLab	oklab(36.32% -0.0029 -0.1557)
OKLCH	oklch(36.32% 0.156 268.9)
XYZ	xyz(6.5028, 4.3575, 26.0843)
Luminance	0.0436 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F308E #8E7D1F

analogous

#1F688E #1F308E #461F8E

triadic

#1F308E #8E1F30 #308E1F

tetradic

#1F308E #8E1F68 #8E7D1F #1F8E46

square

#1F308E #8E1F68 #8E7D1F #1F8E46

split-complementary

#1F308E #8E461F #688E1F

monochromatic

#090E2A #141F5C #1F308E #2A41C0 #4F64D9

Accessibility & contrast

On white

11.22

#1F308E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1F308E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F308E

11.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F308E	#FFFFFF	#000000	##FFFFFF
##1F308E	1.00	11.22	1.87	11.22
#FFFFFF	11.22	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004091

Deuteranopia (green-blind)

#00368C

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f308e;
/* rgb */ color: rgb(31, 48, 142);
/* oklch */ color: oklch(36.3% 0.156 268.9);

Tailwind

colors: {
  custom: {
    50: '#6e68b0',
    500: '#1f308e',
    950: '#000000',
  },
}

SCSS

$custom: #1f308e;
$custom-light: #6e68b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f308e",
  "rgb": {
    "r": 31,
    "g": 48,
    "b": 142
  },
  "hsl": {
    "h": 230.811,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.36317,
    "c": 0.15576,
    "h": 268.9
  },
  "luminance": 0.04358
}

Semantic roles & 50–950 ramp

primary

#1F308E

secondary

#BBAB4D

accent

#CE41E7

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1F308E

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

Preview Lab → · Contrast checker → · Palette generator →