#1638B4#1638B4

#1638B4 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.2% C 0.198 H 265.4°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#1638B4
RGB	rgb(22, 56, 180)
HSL	hsl(227, 78%, 40%)
HSV	hsv(227, 88%, 71%)
CMYK	cmyk(87.8%, 68.9%, 0%, 29.4%)
CIE-LAB	lab(30.14, 37.01, -68.16)
CIE-LCH	lch(30.14, 77.56, 298.50°)
OKLab	oklab(41.23% -0.0158 -0.1976)
OKLCH	oklch(41.23% 0.198 265.4)
XYZ	xyz(9.9804, 6.2929, 43.8598)
Luminance	0.0629 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1638B4 #B49216

analogous

#1687B4 #1638B4 #4316B4

triadic

#1638B4 #B41638 #38B416

tetradic

#1638B4 #B41687 #B49216 #16B443

square

#1638B4 #B41687 #B49216 #16B443

split-complementary

#1638B4 #B44316 #87B416

monochromatic

#091647 #0F277D #1638B4 #234DE4 #5A79EB

Accessibility & contrast

On white

9.30

#1638B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1638B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1638B4

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1638B4	#FFFFFF	#000000	##FFFFFF
##1638B4	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB8

Deuteranopia (green-blind)

#003FB2

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1638b4;
/* rgb */ color: rgb(22, 56, 180);
/* oklch */ color: oklch(41.2% 0.198 265.4);

Tailwind

colors: {
  custom: {
    50: '#756ecc',
    500: '#1638b4',
    950: '#000000',
  },
}

SCSS

$custom: #1638b4;
$custom-light: #756ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#1638b4",
  "rgb": {
    "r": 22,
    "g": 56,
    "b": 180
  },
  "hsl": {
    "h": 227.089,
    "s": 78.218,
    "l": 39.608
  },
  "oklch": {
    "l": 0.41232,
    "c": 0.19827,
    "h": 265.4
  },
  "luminance": 0.06294
}

Semantic roles & 50–950 ramp

primary

#1638B4

secondary

#CEB558

accent

#CB33F5

background

#F7F6FC

surface

#EEECF9

border

#C9C7D2

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1638B4

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

Preview Lab → · Contrast checker → · Palette generator →