#1C337B#1C337B

#1C337B is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.0% C 0.126 H 266.4°. Best body text is #FFFFFF at 11.61:1 contrast (WCAG AA passes).

Color values

HEX	#1C337B
RGB	rgb(28, 51, 123)
HSL	hsl(225, 63%, 30%)
HSV	hsv(225, 77%, 48%)
CMYK	cmyk(77.2%, 58.5%, 0%, 51.8%)
CIE-LAB	lab(23.82, 18.63, -43.58)
CIE-LCH	lch(23.82, 47.40, 293.15°)
OKLab	oklab(35.01% -0.0079 -0.1257)
OKLCH	oklch(35.01% 0.126 266.4)
XYZ	xyz(5.2366, 4.0440, 19.2396)
Luminance	0.0404 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C337B #7B641C

analogous

#1C637B #1C337B #351C7B

triadic

#1C337B #7B1C33 #337B1C

tetradic

#1C337B #7B1C63 #7B641C #1C7B35

square

#1C337B #7B1C63 #7B641C #1C7B35

split-complementary

#1C337B #7B351C #637B1C

monochromatic

#060A19 #111E49 #1C337B #2748AD #3E62D3

Accessibility & contrast

On white

11.61

#1C337B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1C337B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C337B

11.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C337B	#FFFFFF	#000000	##FFFFFF
##1C337B	1.00	11.61	1.81	11.61
#FFFFFF	11.61	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D7D

Deuteranopia (green-blind)

#00347A

Tritanopia (blue-blind)

#004551

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1c337b;
/* rgb */ color: rgb(28, 51, 123);
/* oklch */ color: oklch(35.0% 0.126 266.4);

Tailwind

colors: {
  custom: {
    50: '#676aa2',
    500: '#1c337b',
    950: '#000000',
  },
}

SCSS

$custom: #1c337b;
$custom-light: #676aa2;
$custom-dark: #000000;

JSON

{
  "hex": "#1c337b",
  "rgb": {
    "r": 28,
    "g": 51,
    "b": 123
  },
  "hsl": {
    "h": 225.474,
    "s": 62.914,
    "l": 29.608
  },
  "oklch": {
    "l": 0.35014,
    "c": 0.12593,
    "h": 266.4
  },
  "luminance": 0.04045
}

Semantic roles & 50–950 ramp

primary

#1C337B

secondary

#AF9544

accent

#BE42E6

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1C337B

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

Preview Lab → · Contrast checker → · Palette generator →