#1F2598#1F2598

#1F2598 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.5% C 0.181 H 270.5°. Best body text is #FFFFFF at 11.82:1 contrast (WCAG AA passes).

Color values

HEX	#1F2598
RGB	rgb(31, 37, 152)
HSL	hsl(237, 66%, 36%)
HSV	hsv(237, 80%, 60%)
CMYK	cmyk(79.6%, 75.7%, 0%, 40.4%)
CIE-LAB	lab(23.27, 39.22, -62.55)
CIE-LCH	lch(23.27, 73.83, 302.09°)
OKLab	oklab(35.51% 0.0015 -0.1812)
OKLCH	oklch(35.51% 0.181 270.5)
XYZ	xyz(6.8922, 3.8807, 30.0855)
Luminance	0.0388 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2598 #98921F

analogous

#1F6198 #1F2598 #551F98

triadic

#1F2598 #981F25 #25981F

tetradic

#1F2598 #981F61 #98921F #1F9855

square

#1F2598 #981F61 #98921F #1F9855

split-complementary

#1F2598 #98551F #61981F

monochromatic

#0A0C32 #151965 #1F2598 #2931CB #555CDC

Accessibility & contrast

On white

11.82

#1F2598 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1F2598 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2598

11.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2598	#FFFFFF	#000000	##FFFFFF
##1F2598	1.00	11.82	1.78	11.82
#FFFFFF	11.82	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D9B

Deuteranopia (green-blind)

#003196

Tritanopia (blue-blind)

#00475D

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f2598;
/* rgb */ color: rgb(31, 37, 152);
/* oklch */ color: oklch(35.5% 0.181 270.5);

Tailwind

colors: {
  custom: {
    50: '#7161b8',
    500: '#1f2598',
    950: '#000000',
  },
}

SCSS

$custom: #1f2598;
$custom-light: #7161b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2598",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 152
  },
  "hsl": {
    "h": 237.025,
    "s": 66.12,
    "l": 35.882
  },
  "oklch": {
    "l": 0.35506,
    "c": 0.18117,
    "h": 270.5
  },
  "luminance": 0.03881
}

Semantic roles & 50–950 ramp

primary

#1F2598

secondary

#C0BA53

accent

#E13FE9

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#090511

muted

#7B7980

Preview Lab

Preview with #1F2598

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

Preview Lab → · Contrast checker → · Palette generator →