#1F3A98#1F3A98

#1F3A98 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.2% C 0.157 H 266.5°. Best body text is #FFFFFF at 9.92:1 contrast (WCAG AA passes).

Color values

HEX	#1F3A98
RGB	rgb(31, 58, 152)
HSL	hsl(227, 66%, 36%)
HSV	hsv(227, 80%, 60%)
CMYK	cmyk(79.6%, 61.8%, 0%, 40.4%)
CIE-LAB	lab(28.34, 25.65, -54.23)
CIE-LCH	lch(28.34, 59.99, 295.31°)
OKLab	oklab(39.19% -0.0095 -0.1568)
OKLCH	oklch(39.19% 0.157 266.5)
XYZ	xyz(7.7436, 5.5835, 30.3693)
Luminance	0.0558 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3A98 #987D1F

analogous

#1F7698 #1F3A98 #411F98

triadic

#1F3A98 #981F3A #3A981F

tetradic

#1F3A98 #981F76 #987D1F #1F9841

square

#1F3A98 #981F76 #987D1F #1F9841

split-complementary

#1F3A98 #98411F #76981F

monochromatic

#0A1332 #152765 #1F3A98 #294DCB #5573DC

Accessibility & contrast

On white

9.92

#1F3A98 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1F3A98 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3A98

9.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3A98	#FFFFFF	#000000	##FFFFFF
##1F3A98	1.00	9.92	2.12	9.92
#FFFFFF	9.92	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499B

Deuteranopia (green-blind)

#003D96

Tritanopia (blue-blind)

#005263

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f3a98;
/* rgb */ color: rgb(31, 58, 152);
/* oklch */ color: oklch(39.2% 0.157 266.5);

Tailwind

colors: {
  custom: {
    50: '#6f6fb7',
    500: '#1f3a98',
    950: '#000000',
  },
}

SCSS

$custom: #1f3a98;
$custom-light: #6f6fb7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3a98",
  "rgb": {
    "r": 31,
    "g": 58,
    "b": 152
  },
  "hsl": {
    "h": 226.612,
    "s": 66.12,
    "l": 35.882
  },
  "oklch": {
    "l": 0.39194,
    "c": 0.15708,
    "h": 266.5
  },
  "luminance": 0.05584
}

Semantic roles & 50–950 ramp

primary

#1F3A98

secondary

#C0A853

accent

#C33FE9

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1F3A98

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

Preview Lab → · Contrast checker → · Palette generator →