#1F3897#1F3897

#1F3897 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.7% C 0.158 H 267.0°. Best body text is #FFFFFF at 10.14:1 contrast (WCAG AA passes).

Color values

HEX	#1F3897
RGB	rgb(31, 56, 151)
HSL	hsl(228, 66%, 36%)
HSV	hsv(228, 79%, 59%)
CMYK	cmyk(79.5%, 62.9%, 0%, 40.8%)
CIE-LAB	lab(27.72, 26.62, -54.63)
CIE-LCH	lch(27.72, 60.77, 295.98°)
OKLab	oklab(38.71% -0.0082 -0.158)
OKLCH	oklch(38.71% 0.158 267)
XYZ	xyz(7.5632, 5.3532, 29.9068)
Luminance	0.0535 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3897 #977E1F

analogous

#1F7497 #1F3897 #421F97

triadic

#1F3897 #971F38 #38971F

tetradic

#1F3897 #971F74 #977E1F #1F9742

square

#1F3897 #971F74 #977E1F #1F9742

split-complementary

#1F3897 #97421F #74971F

monochromatic

#0A1231 #152564 #1F3897 #294BCA #5471DC

Accessibility & contrast

On white

10.14

#1F3897 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1F3897 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3897

10.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3897	#FFFFFF	#000000	##FFFFFF
##1F3897	1.00	10.14	2.07	10.14
#FFFFFF	10.14	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00479A

Deuteranopia (green-blind)

#003C95

Tritanopia (blue-blind)

#005162

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1f3897;
/* rgb */ color: rgb(31, 56, 151);
/* oklch */ color: oklch(38.7% 0.158 267.0);

Tailwind

colors: {
  custom: {
    50: '#6f6eb6',
    500: '#1f3897',
    950: '#000000',
  },
}

SCSS

$custom: #1f3897;
$custom-light: #6f6eb6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3897",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 151
  },
  "hsl": {
    "h": 227.5,
    "s": 65.934,
    "l": 35.686
  },
  "oklch": {
    "l": 0.38708,
    "c": 0.15819,
    "h": 267
  },
  "luminance": 0.05354
}

Semantic roles & 50–950 ramp

primary

#1F3897

secondary

#BFA952

accent

#C53FE9

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1F3897

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

Preview Lab → · Contrast checker → · Palette generator →