#1F4E9E#1F4E9E

#1F4E9E is a dark, vivid blue. Relative luminance 0.082; OKLCH L 43.9% C 0.140 H 260.4°. Best body text is #FFFFFF at 7.95:1 contrast (WCAG AA passes).

Color values

HEX	#1F4E9E
RGB	rgb(31, 78, 158)
HSL	hsl(218, 67%, 37%)
HSV	hsv(218, 80%, 62%)
CMYK	cmyk(80.4%, 50.6%, 0%, 38%)
CIE-LAB	lab(34.41, 14.41, -48.00)
CIE-LCH	lch(34.41, 50.12, 286.71°)
OKLab	oklab(43.93% -0.0234 -0.1381)
OKLCH	oklch(43.93% 0.14 260.4)
XYZ	xyz(9.4588, 8.2076, 33.4268)
Luminance	0.0821 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4E9E #9E6F1F

analogous

#1F8E9E #1F4E9E #2F1F9E

triadic

#1F4E9E #9E1F4E #4E9E1F

tetradic

#1F4E9E #9E1F8E #9E6F1F #1F9E2F

square

#1F4E9E #9E1F8E #9E6F1F #1F9E2F

split-complementary

#1F4E9E #9E2F1F #8E9E1F

monochromatic

#0B1B38 #15356B #1F4E9E #2967D1 #598ADE

Accessibility & contrast

On white

7.95

#1F4E9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#1F4E9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4E9E

7.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4E9E	#FFFFFF	#000000	##FFFFFF
##1F4E9E	1.00	7.95	2.64	7.95
#FFFFFF	7.95	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D57A1

Deuteranopia (green-blind)

#004B9C

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f4e9e;
/* rgb */ color: rgb(31, 78, 158);
/* oklch */ color: oklch(43.9% 0.140 260.4);

Tailwind

colors: {
  custom: {
    50: '#707ebb',
    500: '#1f4e9e',
    950: '#000000',
  },
}

SCSS

$custom: #1f4e9e;
$custom-light: #707ebb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4e9e",
  "rgb": {
    "r": 31,
    "g": 78,
    "b": 158
  },
  "hsl": {
    "h": 217.795,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.4393,
    "c": 0.14009,
    "h": 260.4
  },
  "luminance": 0.08209
}

Semantic roles & 50–950 ramp

primary

#1F4E9E

secondary

#C29A56

accent

#AA3EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F4E9E

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

Preview Lab → · Contrast checker → · Palette generator →