#1F4F9E#1F4F9E

#1F4F9E is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.2% C 0.139 H 260.0°. Best body text is #FFFFFF at 7.86:1 contrast (WCAG AA passes).

Color values

HEX	#1F4F9E
RGB	rgb(31, 79, 158)
HSL	hsl(217, 67%, 37%)
HSV	hsv(217, 80%, 62%)
CMYK	cmyk(80.4%, 50%, 0%, 38%)
CIE-LAB	lab(34.70, 13.74, -47.53)
CIE-LCH	lch(34.70, 49.48, 286.12°)
OKLab	oklab(44.15% -0.0242 -0.1367)
OKLCH	oklch(44.15% 0.139 260)
XYZ	xyz(9.5304, 8.3508, 33.4507)
Luminance	0.0835 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4F9E #9E6E1F

analogous

#1F8F9E #1F4F9E #2F1F9E

triadic

#1F4F9E #9E1F4F #4F9E1F

tetradic

#1F4F9E #9E1F8F #9E6E1F #1F9E2F

square

#1F4F9E #9E1F8F #9E6E1F #1F9E2F

split-complementary

#1F4F9E #9E2F1F #8F9E1F

monochromatic

#0B1C38 #15356B #1F4F9E #2969D1 #598BDE

Accessibility & contrast

On white

7.86

#1F4F9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#1F4F9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4F9E

7.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4F9E	#FFFFFF	#000000	##FFFFFF
##1F4F9E	1.00	7.86	2.67	7.86
#FFFFFF	7.86	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2058A1

Deuteranopia (green-blind)

#004C9C

Tritanopia (blue-blind)

#00626F

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f4f9e;
/* rgb */ color: rgb(31, 79, 158);
/* oklch */ color: oklch(44.2% 0.139 260.0);

Tailwind

colors: {
  custom: {
    50: '#707fbb',
    500: '#1f4f9e',
    950: '#000000',
  },
}

SCSS

$custom: #1f4f9e;
$custom-light: #707fbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4f9e",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 158
  },
  "hsl": {
    "h": 217.323,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.44153,
    "c": 0.13885,
    "h": 260
  },
  "luminance": 0.08352
}

Semantic roles & 50–950 ramp

primary

#1F4F9E

secondary

#C29A56

accent

#A93EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F4F9E

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

Preview Lab → · Contrast checker → · Palette generator →