#1538B4#1538B4

#1538B4 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.2% C 0.198 H 265.3°. Best body text is #FFFFFF at 9.31:1 contrast (WCAG AA passes).

Color values

HEX	#1538B4
RGB	rgb(21, 56, 180)
HSL	hsl(227, 79%, 39%)
HSV	hsv(227, 88%, 71%)
CMYK	cmyk(88.3%, 68.9%, 0%, 29.4%)
CIE-LAB	lab(30.11, 36.96, -68.20)
CIE-LCH	lch(30.11, 77.57, 298.45°)
OKLab	oklab(41.2% -0.0164 -0.1978)
OKLCH	oklch(41.2% 0.198 265.3)
XYZ	xyz(9.9587, 6.2818, 43.8588)
Luminance	0.0628 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1538B4 #B49115

analogous

#1588B4 #1538B4 #4115B4

triadic

#1538B4 #B41538 #38B415

tetradic

#1538B4 #B41588 #B49115 #15B441

square

#1538B4 #B41588 #B49115 #15B441

split-complementary

#1538B4 #B44115 #88B415

monochromatic

#081646 #0F277D #1538B4 #214CE5 #5878EC

Accessibility & contrast

On white

9.31

#1538B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1538B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1538B4

9.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1538B4	#FFFFFF	#000000	##FFFFFF
##1538B4	1.00	9.31	2.26	9.31
#FFFFFF	9.31	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.31	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: #1538b4;
/* rgb */ color: rgb(21, 56, 180);
/* oklch */ color: oklch(41.2% 0.198 265.3);

Tailwind

colors: {
  custom: {
    50: '#756ecc',
    500: '#1538b4',
    950: '#000000',
  },
}

SCSS

$custom: #1538b4;
$custom-light: #756ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#1538b4",
  "rgb": {
    "r": 21,
    "g": 56,
    "b": 180
  },
  "hsl": {
    "h": 226.792,
    "s": 79.104,
    "l": 39.412
  },
  "oklch": {
    "l": 0.41204,
    "c": 0.19846,
    "h": 265.3
  },
  "luminance": 0.06283
}

Semantic roles & 50–950 ramp

primary

#1538B4

secondary

#CFB456

accent

#CB32F6

background

#F7F6FC

surface

#EEECF9

border

#C9C7D2

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1538B4

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

Preview Lab → · Contrast checker → · Palette generator →