#1B3A98#1B3A98

#1B3A98 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.0% C 0.158 H 265.4°. Best body text is #FFFFFF at 9.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B3A98
RGB	rgb(27, 58, 152)
HSL	hsl(225, 70%, 35%)
HSV	hsv(225, 82%, 60%)
CMYK	cmyk(82.2%, 61.8%, 0%, 40.4%)
CIE-LAB	lab(28.18, 25.26, -54.49)
CIE-LCH	lch(28.18, 60.06, 294.87°)
OKLab	oklab(39.03% -0.0126 -0.1576)
OKLCH	oklch(39.03% 0.158 265.4)
XYZ	xyz(7.6305, 5.5252, 30.3640)
Luminance	0.0553 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3A98 #98791B

analogous

#1B7898 #1B3A98 #3B1B98

triadic

#1B3A98 #981B3A #3A981B

tetradic

#1B3A98 #981B78 #98791B #1B983B

square

#1B3A98 #981B78 #98791B #1B983B

split-complementary

#1B3A98 #983B1B #78981B

monochromatic

#091230 #122664 #1B3A98 #244ECC #4E72E0

Accessibility & contrast

On white

9.98

#1B3A98 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1B3A98 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3A98

9.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3A98	#FFFFFF	#000000	##FFFFFF
##1B3A98	1.00	9.98	2.11	9.98
#FFFFFF	9.98	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00489B

Deuteranopia (green-blind)

#003D96

Tritanopia (blue-blind)

#005263

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3a98;
/* rgb */ color: rgb(27, 58, 152);
/* oklch */ color: oklch(39.0% 0.158 265.4);

Tailwind

colors: {
  custom: {
    50: '#6e6fb7',
    500: '#1b3a98',
    950: '#000000',
  },
}

SCSS

$custom: #1b3a98;
$custom-light: #6e6fb7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3a98",
  "rgb": {
    "r": 27,
    "g": 58,
    "b": 152
  },
  "hsl": {
    "h": 225.12,
    "s": 69.832,
    "l": 35.098
  },
  "oklch": {
    "l": 0.39035,
    "c": 0.15813,
    "h": 265.4
  },
  "luminance": 0.05526
}

Semantic roles & 50–950 ramp

primary

#1B3A98

secondary

#C2A54D

accent

#C13BED

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1B3A98

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

Preview Lab → · Contrast checker → · Palette generator →