#1F4598#1F4598

#1F4598 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.5% C 0.143 H 263.1°. Best body text is #FFFFFF at 8.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F4598
RGB	rgb(31, 69, 152)
HSL	hsl(221, 66%, 36%)
HSV	hsv(221, 80%, 60%)
CMYK	cmyk(79.6%, 54.6%, 0%, 40.4%)
CIE-LAB	lab(31.38, 18.13, -49.28)
CIE-LCH	lch(31.38, 52.51, 290.20°)
OKLab	oklab(41.48% -0.0172 -0.1421)
OKLCH	oklch(41.48% 0.143 263.1)
XYZ	xyz(8.3587, 6.8136, 30.5743)
Luminance	0.0682 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4598 #98721F

analogous

#1F8198 #1F4598 #351F98

triadic

#1F4598 #981F45 #45981F

tetradic

#1F4598 #981F81 #98721F #1F9835

square

#1F4598 #981F81 #98721F #1F9835

split-complementary

#1F4598 #98351F #81981F

monochromatic

#0A1732 #152E65 #1F4598 #295CCB #5580DC

Accessibility & contrast

On white

8.89

#1F4598 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1F4598 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4598

8.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4598	#FFFFFF	#000000	##FFFFFF
##1F4598	1.00	8.89	2.36	8.89
#FFFFFF	8.89	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01509B

Deuteranopia (green-blind)

#004596

Tritanopia (blue-blind)

#005967

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1f4598;
/* rgb */ color: rgb(31, 69, 152);
/* oklch */ color: oklch(41.5% 0.143 263.1);

Tailwind

colors: {
  custom: {
    50: '#6f78b7',
    500: '#1f4598',
    950: '#000000',
  },
}

SCSS

$custom: #1f4598;
$custom-light: #6f78b7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4598",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 152
  },
  "hsl": {
    "h": 221.157,
    "s": 66.12,
    "l": 35.882
  },
  "oklch": {
    "l": 0.41479,
    "c": 0.1431,
    "h": 263.1
  },
  "luminance": 0.06815
}

Semantic roles & 50–950 ramp

primary

#1F4598

secondary

#C09E53

accent

#B43FE9

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1F4598

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

Preview Lab → · Contrast checker → · Palette generator →