#1633B4#1633B4

#1633B4 is a dark, highly saturated blue. Relative luminance 0.058; OKLCH L 40.4% C 0.204 H 266.0°. Best body text is #FFFFFF at 9.69:1 contrast (WCAG AA passes).

Color values

HEX	#1633B4
RGB	rgb(22, 51, 180)
HSL	hsl(229, 78%, 40%)
HSV	hsv(229, 88%, 71%)
CMYK	cmyk(87.8%, 71.7%, 0%, 29.4%)
CIE-LAB	lab(28.99, 40.16, -70.06)
CIE-LCH	lch(28.99, 80.75, 299.82°)
OKLab	oklab(40.39% -0.0142 -0.2032)
OKLCH	oklch(40.39% 0.204 266)
XYZ	xyz(9.7500, 5.8323, 43.7830)
Luminance	0.0583 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1633B4 #B49716

analogous

#1682B4 #1633B4 #4816B4

triadic

#1633B4 #B41633 #33B416

tetradic

#1633B4 #B41682 #B49716 #16B448

square

#1633B4 #B41682 #B49716 #16B448

split-complementary

#1633B4 #B44816 #82B416

monochromatic

#091447 #0F247D #1633B4 #2347E4 #5A74EB

Accessibility & contrast

On white

9.69

#1633B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#1633B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1633B4

9.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1633B4	#FFFFFF	#000000	##FFFFFF
##1633B4	1.00	9.69	2.17	9.69
#FFFFFF	9.69	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB8

Deuteranopia (green-blind)

#003DB2

Tritanopia (blue-blind)

#005870

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1633b4;
/* rgb */ color: rgb(22, 51, 180);
/* oklch */ color: oklch(40.4% 0.204 266.0);

Tailwind

colors: {
  custom: {
    50: '#756bcc',
    500: '#1633b4',
    950: '#000000',
  },
}

SCSS

$custom: #1633b4;
$custom-light: #756bcc;
$custom-dark: #000000;

JSON

{
  "hex": "#1633b4",
  "rgb": {
    "r": 22,
    "g": 51,
    "b": 180
  },
  "hsl": {
    "h": 228.987,
    "s": 78.218,
    "l": 39.608
  },
  "oklch": {
    "l": 0.40394,
    "c": 0.20367,
    "h": 266
  },
  "luminance": 0.05834
}

Semantic roles & 50–950 ramp

primary

#1633B4

secondary

#CEB858

accent

#D133F5

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0A0614

muted

#7C7A82

Preview Lab

Preview with #1633B4

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

Preview Lab → · Contrast checker → · Palette generator →