#1F357E#1F357E

#1F357E is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.9% C 0.127 H 267.0°. Best body text is #FFFFFF at 11.24:1 contrast (WCAG AA passes).

Color values

HEX	#1F357E
RGB	rgb(31, 53, 126)
HSL	hsl(226, 61%, 31%)
HSV	hsv(226, 75%, 49%)
CMYK	cmyk(75.4%, 57.9%, 0%, 50.6%)
CIE-LAB	lab(24.78, 18.84, -43.91)
CIE-LCH	lch(24.78, 47.78, 293.22°)
OKLab	oklab(35.85% -0.0066 -0.1265)
OKLCH	oklch(35.85% 0.127 267)
XYZ	xyz(5.6028, 4.3433, 20.2777)
Luminance	0.0434 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F357E #7E681F

analogous

#1F647E #1F357E #381F7E

triadic

#1F357E #7E1F35 #357E1F

tetradic

#1F357E #7E1F64 #7E681F #1F7E38

square

#1F357E #7E1F64 #7E681F #1F7E38

split-complementary

#1F357E #7E381F #647E1F

monochromatic

#070C1C #13204D #1F357E #2B4AAF #4666D1

Accessibility & contrast

On white

11.24

#1F357E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1F357E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F357E

11.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F357E	#FFFFFF	#000000	##FFFFFF
##1F357E	1.00	11.24	1.87	11.24
#FFFFFF	11.24	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F81

Deuteranopia (green-blind)

#00377D

Tritanopia (blue-blind)

#004754

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f357e;
/* rgb */ color: rgb(31, 53, 126);
/* oklch */ color: oklch(35.9% 0.127 267.0);

Tailwind

colors: {
  custom: {
    50: '#696ba4',
    500: '#1f357e',
    950: '#000000',
  },
}

SCSS

$custom: #1f357e;
$custom-light: #696ba4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f357e",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 126
  },
  "hsl": {
    "h": 226.105,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.3585,
    "c": 0.12672,
    "h": 267
  },
  "luminance": 0.04344
}

Semantic roles & 50–950 ramp

primary

#1F357E

secondary

#B19948

accent

#BF44E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F357E

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

Preview Lab → · Contrast checker → · Palette generator →