#1F3A97#1F3A97

#1F3A97 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.1% C 0.156 H 266.5°. Best body text is #FFFFFF at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#1F3A97
RGB	rgb(31, 58, 151)
HSL	hsl(227, 66%, 36%)
HSV	hsv(227, 79%, 59%)
CMYK	cmyk(79.5%, 61.6%, 0%, 40.8%)
CIE-LAB	lab(28.25, 25.26, -53.76)
CIE-LCH	lch(28.25, 59.40, 295.17°)
OKLab	oklab(39.1% -0.0095 -0.1554)
OKLCH	oklch(39.1% 0.156 266.5)
XYZ	xyz(7.6621, 5.5509, 29.9398)
Luminance	0.0555 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3A97 #977C1F

analogous

#1F7697 #1F3A97 #401F97

triadic

#1F3A97 #971F3A #3A971F

tetradic

#1F3A97 #971F76 #977C1F #1F9740

square

#1F3A97 #971F76 #977C1F #1F9740

split-complementary

#1F3A97 #97401F #76971F

monochromatic

#0A1331 #152664 #1F3A97 #294ECA #5473DC

Accessibility & contrast

On white

9.95

#1F3A97 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1F3A97 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3A97

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3A97	#FFFFFF	#000000	##FFFFFF
##1F3A97	1.00	9.95	2.11	9.95
#FFFFFF	9.95	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00489A

Deuteranopia (green-blind)

#003D95

Tritanopia (blue-blind)

#005262

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f3a97;
/* rgb */ color: rgb(31, 58, 151);
/* oklch */ color: oklch(39.1% 0.156 266.5);

Tailwind

colors: {
  custom: {
    50: '#6f6fb6',
    500: '#1f3a97',
    950: '#000000',
  },
}

SCSS

$custom: #1f3a97;
$custom-light: #6f6fb6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3a97",
  "rgb": {
    "r": 31,
    "g": 58,
    "b": 151
  },
  "hsl": {
    "h": 226.5,
    "s": 65.934,
    "l": 35.686
  },
  "oklch": {
    "l": 0.39103,
    "c": 0.1557,
    "h": 266.5
  },
  "luminance": 0.05552
}

Semantic roles & 50–950 ramp

primary

#1F3A97

secondary

#BFA752

accent

#C33FE9

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1F3A97

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

Preview Lab → · Contrast checker → · Palette generator →